Solar&Planetary LtE for CMO/ISMO #13 (CMO #387)
Not every email is necessarily cited in the PDF’s
CMO LtE
The latest is at the top
¤·······Subject:
Jupiter July 21
Received: Thu
Attached
are images of Jupiter under very good seeing conditions this morning. Note Europa in transit at the
Sean WALKER (S&T)
¤·······Subject:
July 16 Ha and white light images
Received:
Hi Folks, Here are yesterday's
solar images throughout the Lunt 100 at .5A and through an Explore Scientific
127mm APO with a Lunt wedge.
Enjoy
http://scopetrader.com/jimlafferty/?page=59
Regards,
Jim LAFFERTY (
http://scopetrader.com/jimlafferty
¤·······Subject:
Solar images
Received:
Hi Guys
Here are some images
of the main action from this day. Namely Active Regions
AR11250 11251 and 11254. 11251
being vast!
We have a full disc shot and a nice prom too.
Full disc is a 9 frame mosaic at 800mm fl off
Previous July and June images can be found on
the links below, as indeed can Bugs Saturn Solar NLCs Lunar and Mars from the RECENT IMAGES
index page, i.e. the lower link.
Click any image to enlarge.
http://www.david-tyler.com/upload/upload_page.asp?IMU_PAGE_NAME=Solar%202011%20July
http://www.david-tyler.com/upload/upload_page.asp?IMU_PAGE_NAME=Solar%202011%20June
http://www.david-tyler.com/upload_index.asp
Best wishes
Dave TYLER (Flackwell Heath, Bucks, the
Ham call G4PIE
¤········Subject:
Jupiter, 14 and 15 july 2011
Received:
Hi all,
Good seeing on the
14th and excellent on the 15th. These images are taken with the new camera PLA-Mx as well as the Atmospheric dispersion corrector (ADC).
http://pellier.christophe.perso.sfr.fr/J110714-CPE.jpg
http://pellier.christophe.perso.sfr.fr/J110715-CPE.jpg
I really like the colorful aspect of the SEB on the 15th, optically enlarged
by the presence of the little STrB. Will it complete
the whole turn of the globe, like in 1990-91 ? The
current aspect of the SEB/GRS reminds me quite a lot the aspect of the region
after the 1990 SEB revival...
Best wishes,
Christophe PELLIER
(
¤········Subject:
Saturn 2011.07.15
Received:
Dears,
A single IR image
under bad conditions (turbulence due to clouds passing), without any details
clearly visible :
http://astrosurf.com/delcroix/images/planches/s20110715-MDe.jpg
Steadier skies,
Marc DELCROIX (
¤········Subject:
Jupiter 2011.07.15
Received:
Dears,
Jupiter under average
conditions:
http://astrosurf.com/delcroix/images/planches/j20110715-MDe.jpg
SEB is spread in
latitude, with the reddish/brown SEBz clearly seen
between SEBn and SEBs, and
STB partially formed rising. Two barges are transiting at meridian of NTB, a
reddish spot at NTZ difficult to see in RVB, but obvious in methane and IR
images.
Additionally
here is an animation of 3 IR images:
http://astrosurf.com/delcroix/videos/j20110715i-MDe.gif
Steady skies,
Marc DELCROIX (
¤········Subject:
Transit of Venus Project Newsletter #2
Received:
Dear all, A couple of new items have been added to the Transit of
Venus Project's website during the last month: two exciting projects to join,
and a new look for the local predictions of the 1639-2125 transits.
The sun's distance by
simultaneous solar imaging
Next to the classical method of Halley (timing
the start and end of the transit from different locations), there's another
method to determine the sun's distance from a transit of Venus: photographing
the sun at the same moment from different locations. This procedure was out of
the question in the 18th and 19th century because of difficulties with exact
time keeping, but thanks to today's techniques it's now possible to conduct
this method. Besides, it has a strong didactical value too, because the effect
of parallax is directly perceivable and agrees with the way we experience
parallax in daily life. Right now, a brief description of the method is given;
an explanation of the evaluation of the results will follow shortly.
See transitofvenus.nl/wp/getting-involved/measure-the-suns-distance/
Observing the aureole effect
One of the more
peculiar effects during ingress and egress is the illumination of Venus'
atmosphere, and it keeps us surprising. Recently, Bill Sheehan and Jay Pasachoff showed that the first astronomer who observed
this aureole effect in 1761 and attributed it to the atmosphere of Venus wasn't
Michael Lomonosov, as was long thought. Using 2004
recordings of the aureole effect, Paolo Tanga
investigated the effect and related its appearance to the structure of the
planet's atmosphere. Tanga now invites you to make
subsequent observations of the aureole during the 2012 transit of Venus in
order to contribute to our understanding of the upper atmosphere of Venus.
See transitofvenus.nl/wp/observing/aureole/
Local predictions of
the 1639-2125 transits
This is one of the key
pages for your preparations for the 2012 transit of Venus. Where and when is
the transit visible? What time are the contacts at my place? What part of the
transit will I be able to see? You'll find an answer to these questions on our
website. And there's more. You can also find the circumstances of all the
transits back to the one Jeremiah Horrocks saw in
December 1639, and look into the future up to the transit of December 2125. François
Mignard formulated the algorithm for the computation
of the contacts, and our web developer Rikkert Koppes managed to present all data in a user friendly and
catchy design. Make sure to stop by!
See transitofvenus.nl/wp/where-when/local-transit-times/
I would
like to thank all of you who have made a donation to fund the development of
our phone app. But we're still short of our $15,000 goal. Please consider
making or increasing your donation ? today! Without your support, we won't be able to start
developing the app that will assist you and thousands of others in observing
next year's transit. For more information see the detailed plan on Chuck Bueter's website:
www.transitofvenus.org/education/video-new-media/217-phone-app.
You are
also invited to join our group on Facebook:
www.facebook.com/groups/108400462513165.
If this newsletter was forwarded to you and
you would like to be on our mailing list, just send a message to info@transitofvenus.nl and you'll be kept in the loop. If you're
thinking about contributing to our website, don't hesitate to contact us!
Clear skies!
Steven van
ROODE
(on behalf of the Transit of Venus Project)
¤········Subject:
Jupiter 14 July
Received:
Hi All,
I have attached some RGB, CH4, NIR and UV
Jupiter images from 14 July. Best,
Don PARKER (
¤········Subject:
Solar images
Received:
Hi Guys.
There were a couple of decent and very
different proms on show on the 14th along with two very active regions.
Best wishes
Dave TYLER (Flackwell Heath, Bucks, the
¤········Subject:
Jupiter 12 July
Received:
Hi All,
I have
attached some RGB, CH4, NIR and UV Jupiter images from 12 July under average
seeing. The relative humidity was only 90%. Note the reddish material that
appears to be "leaking" from the GRS northeastward
into the SEBz. Best,
Don PARKER (
¤········Subject:
Finally some Sun!
Received: Thu
Finally I got a clear
morning this summer so went a bit OCD imaging anything and everything.......
All of the
Active Regions in WL and HA. Most of the large proms including an
impressive eruptive on the SE and granulation - I continue to be really amazed
at the detail this skywatcher 120mm achro is giving me in white light, remember each of these
convective cells is only about 1500kms across!
I’ve been
away from imaging due to the bad summer collecting data with my magnetometer
and currently planning a VLF receiver for capturing solar flares, hence the
lack of interaction.
Dave
GRADWELL (Run-off observatory near Birr Ireland)
btw the usual set-up
PST-B120, DMK21, Baader HW, H-Alpha at 1500mm
FL, WL at 3000mm FL
¤········Subject:
July 12 solar Hα images
Received: Thu
Hi Folks, To follow-up on Dave's fine images, here are some shots
taken the following day of the sun in Hα with
the Luntanado (Lunt 100Tha and
Regards,
Jim LAFFERTY
(
¤········Subject:
solar images
Received:
Hi Guys, There were
lots of active regions on the 11th July, so we have lots of images. I needed to
do a full disc as a map to identify all the higher res ones. There was a nice faint
arching prominence too.
Most of today's pics were off the AP with
Dave TYLER (Flackwell Heath, Bucks, the
¤········Subject:
Happy Anniversary
Received:
Hello!
Today, July 12 2011, around 10pm Greenwich
Mean Time (pretty much now) planet Neptune has completed one orbit around the
Sun (so 360° in terms of heliocentric longitude) since it was visually
discovered in the night of September 23 / 24 1846 in Berlin by Johann Galle and
Heinrich d'Arrest, confirming the calculations by Urbain Joseph Le Verrier and
later also those by John Adams.
At the
Roseland Observatory in
As far as I am concerned, ever since I started
making film (2005), I have been wanting to make a film, in fact a fiction and a
documentary film, about the incredible
story that led up to the visual discovery and the events that followed it. I
have set several steps along that way, together with a few other people.
This spring I decided to start filming for the
documentary, all still quite preliminary and without support from any TV or
production company.
A number of people have helped me and I thank
them very much.
At the moment, the project is standing more or
less still, due to the lack of financial support, but I do intend to continue
and perhaps this short extract will help, who knows.
Here is a first tiny bit of the English part
of the story edited together, just to give you a feel. It is nothing finished
and some of the editing is a bit on the experimental side. But perhaps there
are a few things in there you didn't know yet :
Take a look on my Planetary Science Channel on
VIMEO, where you can find this film, which I called 'Searching for
http://www.vimeo.com/channels/planetaryscience
I am looking forward to making the full
version of the documentary and the fiction film as well.
In the mean time, you might also want to check
out these links here:
universetoday.com/?87392/?happy-anniversary-neptune/?#more-87392
skyatnightmagazine.com/?news/?once-round-sun-neptune
Happy Anniversary
Best wishes to all
Maarten
ROOS
(Filmmaker, Editor & Planetary Scientist)
¤········Subject:
Pic du Midi's image
Received:
Dear Christophe, Thank you for your
prompt reply. PdM's Nov 2007 image is great! I
hurried myself into reviewing 2007's pre-opposition HST images and the probe
images with similar lighting conditions, as well as ESA ROSETTA OSIRIS image on
24 Feb 2007(attached the other day) for checking confusing albedo
features around the Elysium volcanoes. …And now, I also believe the renowned
1-meter Cassegrain's image easily (of course with the
imagers' good skills) shows the real relief natures of Elysium Mons and Hecates Tholus with their true
sizes.
The comparison with Damian PEACH's
image is very interesting and informative;it may give us a hint as to how an excellent
imager's near-the-limit works can show on/below-the-limit Martian features.
Have a good vacation! Expecting your next
draft,
Reiichi KONNAÏ (
¤········Subject:
Re: Only wines for
Received: Tue 07
Hi, Reiichi and
Masatsugu,
What a picturesque bottle of saké--it reminds me of the time I first tasted it in
Here at the Sheehans,
we settled for brownies--with blueberries added for
Bill
SHEEHAN
(
¤········Subject:
Jupiter 10 July
Received:
Hi All,
I have attached some RGB, CH4, NIR and UV
Jupiter images from 10 July.
Best,
Don PARKER (
¤········Subject:
Only wines for
Received:
Hi, all
areoalcoholics,
My wife
Reiko who is an incurable vinoholic recommends me
2007 Opus One in her wine
refrigerator for the special memorial day.
Unfortunately, I don't have a taste for wines.
I will
raise a glass of Minowa-Mon, my favorite
saké…classified as rice wine?
Anyway,
Happy Birthday, Neptune!
Rei-ichi KON-NAÏ (
¤········Subject:
Note on Elysium
Received:
mars_2007_JLD.jpg,
marscompar_DPc_jld.jpg
Dear Reiichi, Masatsugu,
I'm sorry
I've belayed the work about Elysium a bit - I will work on it on the following
days, but it looks more reasonable for me to publish it on the august issue of
ISMO. From Wednesday I think, I will be
on holidays in my usual summer residence in Morbihan,
next to the coast, but we don't have internet other there, however from time to
time I go back to my parent's home 25 mn away by car
to take some "news of the world"...
By the way
Masatsugu requested me to see the PdM's image taken
in November 2007 - here it is. It has been made by
Jean-Luc Dauvergne (journalist at Ciel et Espace) and
François Colas. Right now I don't have the exact date. It has been taken in
near IR, and I believe it shows Elysium Mons and Hecatus
tolus as small relief structures... what do you think?
I include also a comparison I have made that year with an R image taken by Damian, that we used to discuss on an Astrosurf
topic. One could guess the same structures, but the diffraction makes them
bigger than reality.
Best
wishes,
Christophe PELLIER (
¤········Subject:
RE: Happy Birthday,
Received:
A nice English stout
will also work. Got my
"VOYAGER NEPTUNE" shirt ready.
C. Renee
JAMES
(Physics Department,
¤········Subject:
Jupiter this morning 2
Received:
Hi All, This one shows the
GRS in a bit more detail, being on the meridian.
All the best
Simon KIDD (Welwyn, Herts, the UK)
¤········Subject:
Re: Happy Birthday,
Received:
Gentlefolk,
Celebrations indeed - we in a small way will be doing so at the Observatory
with a gathering, talk and a bun or two. .I will be showing off the latest
harvest of
Incidentally
there are good English wines to be had, we are even
beating the French these days.
Off to
the Shetlands to look at Stone Circles up there.
Brian SHEEN (Roseland Observatory, the
¤········Subject:
Jupiter this morning
Received:
Hi All, From early
this morning, an image taken under quite good conditions. Altitude at this time is now about 33
degrees.
All the best
Simon KIDD (Welwyn, Herts, the UK)
¤········Subject:
RE: Happy Birthday,
Received:
I will raise a glass
too, but as there aren't any good British wines it will have to be for me a
nice vintage
Richard McKIM (BAA, the
¤········Subject:
RE: Happy Birthday,
Received:
Wait...you don't
suggest a good British wine? Happy
Birthday,
C. Renee
JAMES
(Physics Department,
¤········Subject:
Re: Happy Birthday,
Received:
Hi! On the 12th that is, at around 10pm ! Cheers
Maarten
ROOS (Filmmaker, Editor & Planetary Scientist)
¤········Subject:
Happy Birthday,
Received:
Hi, all, Pop a bottle of good
French wine (or German) tomorrow—I will--as Neptune returns to the heliocentric
longitude of its discovery.
Bill SHEEHAN (
¤········Subject:
Saturn 2011.07.05
Received:
Dears, Around 30° elevation, my 27th set of images for this
apparition with a map of the storm. The bright white spot at 47° LIII is what i now suspect to be the rest of the head of the storm which
could have drifted in latitude down to the south tail:
http://astrosurf.com/delcroix/images/planches/s20110705-MDe.jpg
A montage
with Saturn in RGB and R+IR brightness enhanced Satellites (from left to right
Tethys, Enceladus, Saturn, Dione,
Rhea and Titan):
http://astrosurf.com/delcroix/images/saturne_20110705_satellites.jpg
Same 100% R+IR:
http://astrosurf.com/delcroix/images/saturne_20110705r_satellites.jpg
Sincerely,
Marc DELCROIX (
¤········Subject:
Solar images
Received:
Hi Guys
Here are three images that bring my backlog up
to date. Seeing was very iffy through cloud and off cloud edges, with variable
brightness of course. I find R6 does not like these conditions.
Still,
a few images were captured, no mosaics as no continuity.
The
"arm like" filprom was very bright and
looked like it might do something exciting, but alas no. An interesting feature nevertheless.
Best wishes
Dave TYLER (Flackwell
Heath, Bucks, the
¤········Subject:
Solar images
Received:
Hi Guys Here are a
batch of images from the 3rd. I like the filament in ar
11243, it is twisting to reveal its underbelly, and
involvement with the lower levels in the chromosphere
below it.
Best wishes
Dave TYLER (Flackwell
Heath, Bucks, the
¤········Subject:
Saturn 2011.07.01 & 2011.07.02
Received:
Dears, Saturn
on July 1st, with still some interesting details even if it starts being
difficult to do a good color images in the sunset
sky:
http://astrosurf.com/delcroix/images/planches/s20110701-MDe.jpg
The day after, July
2nd, seeing was worse, only one image can be shown:
http://astrosurf.com/delcroix/images/planches/s20110702-MDe.jpg
Sincerely,
Marc DELCROIX (
¤········Subject:
Jupiter images,
Received: Thu
Hi all,
Here are some first
images of Jupiter for me. Seeing was poor, but it was the occasion to test a
new camera, the PLA-mx from iNova,
that carries the ICX618ALA chip. The camera gives clean images and is promiseful for the future.
http://pellier.christophe.perso.sfr.fr/J110703-CPE.jpg
Best wishes
Christophe
PELLIER
(
¤········Subject:
Thank you from
Received:
Dear Dr. Minami,
Thank you very much
for the received "Communications in
Mars Observations No. 386".
I really want to be in
the mailing list of Mars info because my first dissertation was devoted to
disk-integrated and disk-resolved photometry of Mars in great opposition of
1971 and also in 1973 and 1975. I was lucky to observe Mars during three global
dust storms on it. The obtained results were published that time only in
Russian and they are not known to planetary community. But in October of 2010 I
participated in the conference "Schiaparelli
and his legacy" in Milano and
Lupishko D., Kaydash V., Shkuratov
Yu. “Global dust storms and highly polarizing clouds on Mars”, Memorie della
Societa Astronomica Italiana, 2011. V. 82, No. 2, p. 341-347.
http://sait.oat.ts.astro.it/MSAIt820211/PDF/2011MmSAI..82..341L.pdf
Thanks again.
With best wishes,
Dmitrij LUPISHKO (
¤········Subject:
Pluto Occultation at
Received:
Communicated
from Tomio
AKUTSU
(
¤········Subject:
Saturn, GWS & 4 satellites 2011.06.25
Received:
Dears, Here is what i
got under good conditions at sunset about 10 days ago:
A montage with
satellites in R+IR (from left to right Tethys, Enceladus,
Mimas, Saturn and Dione)
and Saturn in LRGB, please note les the nice details in the GWS:
http://astrosurf.com/delcroix/images/saturne_20110625lrgb_satellites.jpg
Same with Saturn also
in R+IR, the spots in GWS are more obvious at these wavelengths:
http://astrosurf.com/delcroix/images/saturne_20110625rir_satellites.jpg
A 2 frame animations
in R+IR with brightness enhanced satellites:
http://astrosurf.com/delcroix/videos/s20110625r-MDe.gif
And the whole image
set, please note also the tiny spot in the north polar area:
http://astrosurf.com/delcroix/images/planches/s20110625-MDe.jpg
I'm rather satisfied
for a planet around 35° high at sunset, nice for my 24th observation for this
apparition ... Sincerely,
Marc DELCROIX (
¤········Subject:
solar images
Received:
Hi Guys
, bit of a promfest today
08:07ut was a very faint but large loop
08:16ut was bright and
had this massive filamentary "cloud" next to it
08:23ut a long hedgerow
09:01ut is
particularly interesting as the bright end seems to be the bright end of
Best wishes
Dave TYLER (Flackwell Heath, Bucks, the
¤········Subject:
solar images 30 June
Received:
Hi Guys,
You have had one version of the big prom in one style,
A Super
Prominence
Date:
Telescope:
AP130 with
Camera:
Flea3
This was a
very large, faint and fine prominence, it seems to
have "erupted" from the bright region on the limb (shown in negative
on the disc)
well
here's another two of a different time , plus the two Active Regions.
best
wishes
Dave TYLER (Flackwell Heath, Bucks, the
¤········Subject:
Saturn 2011.06.20
Received:
Dears, Under average conditions:
http://astrosurf.com/delcroix/images/planches/s20110620-MDe.jpg
Sincerely,
Marc DELCROIX (
¤·······Subject:
Pseudo-relief -like images of Tharsis Montes
Received:
Dear Dr. Minami, Christophe,
Attached here are some
HST images taken during near-opposition period in the 2003 apparition to show
some examples of pseudo-relief-like images of Martian volcanoes in the extreme
vicinity of limb areas which I have mentioned in my latest email.
On the left side is
the “Hubble's Sharpest View of Mars” monochromatic image(R?
On each 24 Aug image three Tharsis Montes can
clearly be seen along the western limb in very much shadowed-relief-like
appearances (arrows). As they were taken a few days before the opposition, the
dawn terminator was
just over the
western limb; so that in the area near the morning limb, any shadow effect
could have most hardly been expected. Possible causes of the 3-D appearances might
be as follows:
(1) Difference between
the sun's lighting angle with the far side slope of the flank and that with the
near side one for each volcano, which might have resulted in a considerable
difference in the intensity of sunlight reflection between off the flank over
the summit and off the one on this side.
(2) Albedo features
around each volcano area which might have caused a mimetic relief looks in the limb area.
(3) Influence of the
mist along the morning limb.
(4) Embossment-like
pseudo-pseudo-relief-like image caused by excessive image processing.
For the HST images (4) is unlikely because of
their high qualities compared with each volcano's image size, while it seems it
should be kept in mind in inspecting ground-based Martian images.
As for (2), you can check on the 27 Aug image (the
right side one taken on just one day before the opposition) the albedo features around Tharsis Montes area. I feel the
features could have hardly contributed toward making the relief-like images of
the volcanoes in the dawn limb areas.
Then for (3), on the color
HST image in the center, faint mists or clouds seemed
to affect the appearance of the volcanoes, whereas on the monochromatic image
with the least influence of mists, shadowed relief-like appearances are still
conspicuous. So that the effect of the morning mists or clouds seems to be
unlikely also.
Thus my conclusion would be (1) above
mentioned is most likely.
Besides indicating Arsia Mons, the green
arrows are intended to point the delicate notches on the limbs just over the
volcano. In the 2003 CMO Mars Gallery, on some images taken in the period
around the opposition day, extremely conspicuous dark spots are recorded on the
morning limbs just over Arsia Mons;some examples are on the images of:
Donald
C PARKER:
George
HALL: 29 Aug
Ed
GRAFTON: 29 Aug
…Were the dark spots other Fœhn
Phenomena!? …Were the notches on the dawn limbs on the 24 Aug HST images
related to the dark spots captured on the CMO colleagues' images? Best Wishes,
Reiichi KONNAÏ (
¤·······Subject:
Jupiter
Received:
Hi All, A
recent image, Jupiter still quite low. Seeing very variable,
blue channel even worse than usual. All the best
Simon KIDD (Welwyn, Herts, the
¤·······Subject:
Saturn and satellites 2011.06.19
Received:
Dears, Under correct conditions, the R+IR image shows nicely
details with a main birght spot and several smaller
spots in the GWS, looking different in these longitudes than in RGB:
http://astrosurf.com/delcroix/images/planches/s20110619-MDe.jpg
A montage showing the
satellites with reinforced brightness, from left to right Rhea, Tethys, Mimas, Enceladus, Titan and Dione in R+IR:
http://astrosurf.com/delcroix/images/saturne_20110619_rir.jpg
An animation in R+IR:
http://astrosurf.com/delcroix/videos/s20110619r-MDe.gif
Sincerely,
Marc DELCROIX (
¤········Subject:
Saturn 2011.06.13
Received: Thu
Dears, A 15 days old
Saturn, ok given the altitude decreasing day after day :
GWS is seen in these, with a couple of spots :
http://astrosurf.com/delcroix/images/planches/s20110613-MDe.jpg
In R+IR, with
brightness reinforced satellites, from left to right Rhea, Enceladus,
Saturn, Dione and Tethys :
http://astrosurf.com/delcroix/images/saturne20110613_rir_satellites.jpg
An animation in R+IR:
http://astrosurf.com/delcroix/videos/s20110613r-MDe.gif
Sincerely,
Marc DELCROIX (
¤········Subject:
Jupiter J110626 J110627
Received: Thu
The BA spot is evident on the 26 June image, and the 27 June image shows
well a detail of the GRS.
Tomio AKUTSU (
¤········Subject:
Sat 28 06 2011
Received:
Recent shot of Saturn under a favourable condition. Used
a Flea3.
Yukio
MORITA
(
¤········Subject:
Jupiter 2011.06.26
Received:
Dears, First Jupiter for me
this apparition, which i find rather good given that
it was only 30° high, and just above my roof.
http://astrosurf.com/delcroix/images/planches/j20110626-MDe.jpg
GRS is rising, the SEB
very large (please note the two tiny spots on the north edge of the SEB), two
large white SSTB ovals and the red spot at CM in the NNTZ. The IR image is
rather detailed compared to the RGB.
A nice start for me, beware south hemisphere
guys we will get Jupiter high in the sky that year (almost 60° in the South of
France) ;)
Sincerely,
Marc DELCROIX (
¤········Subject:
FW: From bill sheehan
Received:
Dear Masatsugu,
Here are the last two parts of the talk so
you can see how it went forward to the conclusion. Best,
Bill
SHEEHAN (
------
Forwarded Message
From:
Jonathan Wilkendorf
Date:
To:
Bill Sheehan and Antoinette Beiser
Subject:
Re: From bill sheehan
All four
parts of the video are now uploaded. Sorry that the audio is only on one
channel. I haven't found stereo solution yet. Thanks,
http://www.youtube.com/watch?v=z1247XeuAJo
http://www.youtube.com/watch?v=F3TIj1oaK-w
http://www.youtube.com/watch?v=vMUfo3VJHz8
http://www.youtube.com/watch?v=CiIz-LLPsJA
Jonathan WILKENDORF (
¤········Subject:
Note on Elysium
Received:
Attached: HST 17 May 1997_CM175 ENH.jpg,
Profiles of the Volcanoes of Mars.jpg, 2007 PCq's Elysium Images with decreasing longitudes.jpg,
ESA ROSETTA OSIRIS 24Feb2007.jpg, G. Fournier's Drawings of Elysium in T.Saheki's Book.jpg
Dear Christophe, Sorry to be late in
replying, I spent two days in Tokyo Disneyland with my dental clinic staff,
scared by a lot of roller coasters and free fall machines! I have read through your draft on Elysium
Mons, as well as Dr. Minami's email to you he had Cced
to me.
I agree with your conclusions that (1) the
ground-based detection of dark Elysium Mons with our instruments may be
possible but extremely challenging, and (2) the detection of the brightness of
the volcano near opposition period is much easier which implies the exposure of
the bare Elysium Mons.
Last year I made a review of shadowy images of
Martian volcanoes taken by HST and the probes;I found on some shots that
Elysium Mons was recorded as a snug little dome-like relief image of about
150km across(attached is an example of morning side relief image).
Around 150km in diameter is much smaller than the catalogued size of 200~300km,
probably because of its conical profile.
For the detection of a dome-like geographic
structure's shadowed relief image, the formula to get the minimum telescope
aperture required to recognize Kkm across crater which
I introduced in my recent LtE may be applicable; same logic though the sunlit and shadowy sides would be
opposite.
Then the minimum telescope aperture to discern
a 3-D mound image of 150km across on the 20" Martian image would be 52cm …so it seems no easy
even for the skilled ISMO colleague imagers to obtain explicit relief image of
the object.
Actually, most of the candidate images show
relief-like images of Elysium Mons swollen up to almost 250km across. I myself
want to consider that our excellent imagers managed to succeed to get the true
shading of the relief of Elysium Mons, though blurred by the optical
limitations and the seeing conditions. But they are all questionable as the
hourly changes of the dark portion on the images around each candidate shot are
quite uncertain.
As for its summit caldera, it's only 14km
across and might have nothing to do with shadowy appearance in any condition.
As to the bright Elysium Mons, it must be by
far easier optically, and with the favorable apparent
Martian size near opposition, so we can find many many
examples in the CMO Mars Galleries.
I agree with Dr. Minami in the point that in
the period near opposition any relief topography would be most unlikely to show
any shadow with usual meaning, so that the shadow-like parts are due to albedo features. However, I have noticed on some HST images
of near opposition that some Tharsis Volcanoes showed very much relief-like
images in the extreme vicinity of the limb(not terminator) areas;might have been, I
guess, pseudo-relief-like images caused by the greater
difference between the sunlit angle for the far side slope of the flank and
that of the near side one for each volcano, which might have resulted in a
considerable difference in the intensity of antisolar
brightening between the flank over the summit and the one on this side. A
similar effect may be seen on Elysium Mons when located at the near opposition
limb.
Otherwise, I have nothing to request you for
now to add, cut, or reconsider the contents of your draft.
Dr. Minami seems to expect us to make the note
a little longer with some speculations upon the peculiarity of the volcano
itself. But this time I think it's OK as your plot as “A Brief Review of Bare
Elysium
I am also attaching some more images and
scanned figures for your reference:
* For the profile of the volcanoes of Mars,
the vertical scale is exaggerated four times.
* PCq's 29&
* ESA Rosetta Osiris 24 Feb 2007 passing by
image is fantastic! It's a missing link between HST images and the probe images
which gives us an idea as to how the craters near the Martian terminator look
like with a powerful telescope. Interesting albedo features
around Elysium Mons are notable.
* G. Fournier's drawings in Tsuneo Saheki's “Mars and
Its Observation", p.242 may show dark Elysium Mons with its true
size.…Do you know other examples of “Pre-PdM
detection of Elysium Mons by visual observers or by Martian photographers? Best Wishes,
Reiichi KONNAÏ (
¤········Subject:
Saturn and satellites 2011.05.25 (under very good seeing)
Received:
Dears,
It took
some time to process these Saturn from one month ago, taken under a very good
seeing (these Saturn are probably ones of my best).
A very
large collection of most images from UV to CH4 absorption band, with a map of
the GWS with many details (small spots, double head, dark zones,
...). To be noted the head gets really brighter on the last RGB when
close to the meridian from the RGB before, i do not
know if it's only an optical effect.
http://astrosurf.com/delcroix/images/planches/s20110525-MDe.jpg
A montage
(Saturn in RGB, satellites in IR) with Mimas below
the left ring, Enceladus on below the right ring,
then farther Dione (bottom), Tethys and Rhea (at the
right):
http://astrosurf.com/delcroix/images/s20110525rgb-satellites.jpg
Same in
full R+IR:
http://astrosurf.com/delcroix/images/s20110525-satellites.jpg
An animation
in R+IR, with the head of the GWS rising, and Tethys/Dione/Rhea
orbiting around Saturn:
http://astrosurf.com/delcroix/videos/s20110525r-MDe.gif
An
animation with 3 RGB:
http://astrosurf.com/delcroix/videos/saturn_20110525_rgb_anim.gif
Time to
process all my June taken in June now ... Regards,
Marc DELCROIX (
¤········Subject:
Re: YouTubes
Received:
Dear Masatsugu,
The talk that I gave--and you have seen only
the first half--was mainly to inform the audience that Percival Lowell had an
adventurous career before he decided to devote
himself full-time to astronomy.
Surprisingly, few of the audience knew of his career as an expander of
Western Consciousness about what was then regarded as the Inscrutable
East. I shall send the references to the
rest in due course. The talk was very
well received by the audience. I was
told to make it "friendly" and to aim at a very popular level, as
none of these individuals could be assumed to be familiar with much of the
material. There were some astronomers
there however who told me they enjoyed it--including Otto Franz and Wes
Lockwood. It seems to have successfully
completed its assigned task.
It looks as if I will return to Flagstaff in
the autumn to do work in the archives--there is a great deal of interesting
material about Lowell that has hardly been scratched; including his copy of
Newton's Principia (a nineteenth century version) and his love letters to Miss
Struthers, who refused his proposal of marriage because he was not religious
and she did not want to hurt her parents who were.
I read just this morning your essay on Mellish in the latest CMO.
You masterfully demonstrate how little many of those who argue for the
"flat Mars" know of the mathematics that predicts shadow lengths near
the terminator. Jeff Beish's
analysis is shown to be superficial and deceptive (as you say, he uses a flat
map to show Mars is flat! One could do
the same with the Earth). I am glad I
sent the Mellish article to you as it has obviously
pleased so many of our fellow "aeroholics"
as Reiichi Konnaï so justly
describes us.
I have quite a large number of projects
pressuring me now but hope to turn out something soon on Lafcadio
Hearn's experiences in
Best wishes,
Bill SHEEHAN (
¤········Subject:
FW: From bill sheehan
Received:
Dear
Masatsugu,
You can access, via You Tube, the first two
parts of the talk I gave in the Rotunda at Lowell Observatory here.
More to follow,
best, Bill
------
Forwarded Message
From:
Jonathan Wilkendorf
Date:
To:
Bill and Debb, Antoinette Beiser
Subject:
Re: From bill sheehan
Bill,
Sorry it's taking me a
while, but I've gotten half of the video uploaded to youtube. I have to do it in segments shorter than 15
minutes. The links are below for the
first two of four parts.
http://www.youtube.com/watch?v=z1247XeuAJo
http://www.youtube.com/watch?v=F3TIj1oaK-w
I'm also making a
couple of DVDs for Antoinette to send out.
More updates next
week,
Jonathan
-----
Original Message Follows -----
From:
Bill
To:
Jonathan Wilkendorf, Antoinette Beiser
Subject:
From bill sheehan
Date:
> Dear Jonathan,
> I enjoyed participating
in the Friends of Lowell annual
> event, and hope my talk met your needs. Let me know when
> it is on the web, as there are some individuals who would
> probably find it of interest.
> Best wishes, Bill Sheehan
------
End of Forwarded Message
Bill
SHEEHAN
(
¤········Subject:
The Variations of Belts on Jupiter in 2009-2011
Received:
Here
is shown the change of the widths of the Jovian SEB and
As is well known, the SEB belt was not observed in 2010.
SEB disturbance happened in November, while its belt revived after a while. The
width of the SEB increased this year. Note the change of density as well as the
position change of the GRS.
Tomio AKUTSU (
¤········Subject: Re: Your post address
Received:
Dear Masatsugu, We do
have a new address. I read and enjoy the CMO, and I would appreciate it if you
could continue to send it. Please forgive me for not notifying you sooner.
I will mention briefly, since I type slowly now with my
left hand, that I think it unfortunate that Jeff Beish
was called an idiot in CMO #385. Whatever else he is, Beish
is no idiot. He is -or perhaps now was- a friend of the CMO and of ALPO. There
are not so many of us planet observers that we need to pick fights. Instead, we
need to help and encourage one another. I would humbly suggest that an apology
from the LtE writer would be appropriate. My
"gut feeling" is that an apology might sooth some hurt feelings that
could otherwise cause even more problems later. I have not communicated
recently, in the last few years, with Jeff, so this is my suggestion, not his.
Years ago Jeff came across as sometimes abrasive but approachable and good
hearted. Bill Sheehan is certainly a big enough man and author to survive
admitting one mistake. I like Sheehan's books very much.
Three collections of my poems are now available at www.amazon.com. Perhaps you will like the
following, from Meeting and Passing:
My Own Left Hand
For most of my life
my left
hand's role
was purely
ancillary.
It guarded distant
borders,
nibbled at the
soft underbelly,
and tried hard
to avoid
the major
clash of arms.
My left hand rode to
work
or ran to
play
at best as a
sidekick
or an almost
useless appendage.
It did its job,
if there ever
was one,
without fanfare,
thanks, or even notice,
in neither
sense of the word,
recognized.
Now Parkinson's lies
on my right
side
like a heavy
load.
Grasping for
handholds,
not straws,
I grab the old
and
unappreciated friend
my own left
hand.
A little less than
everything
but much more
than nothing,
it holds me
for the moment
suspended
under Heaven
and over the
abyss.
under Heaven
and over the
abyss,
your friend Sam
Samuel R WHITBY (
¤········Subject: Saturn June 17, RGB
Received:
Poor seeing conditions, as
well as atmospheric dispersion degrading the green and blue channels. 12.5" Newtonian, DMK21. RGB filtered exposures centered at
Sean WALKER (Imaging Editor,
¤········Subject: Jupiter 18 June
Received:
Hi
All.
I have attached RGB, CH4 and NIR Jupiter
images from 18 June. The SEB is indistinct in the methane band.
Best,
Don PARKER (
¤········Subject: Note on Elysium
Received:
Dear
Reiichi,
Here
is a first quick draft of an ISMO note about Elysium. Feel free to comment,
add, disagree, in my mind it's truly a working document.
Masatsugu,
feel free also.
I
think I have found some images where we can see Elysium (as well as Hecatus Tholus) as a relief
detail and not only albedo. Shadow effects however
are a bit difficult to see; bright reflection near opposition is probably the
most conspicuous effect.
Best
wishes,
Christophe PELLIER
(
PS:
Masatsugu, what is the CMO code for Reiichi ?
¤········Subject: Transit of Venus Project newsletter #1
Received:
Dear colleagues,
It
has been two weeks since the Transit of Venus Project's website
was
launched, and even in this short period of time it has been much improved. The
transit calculator is now online, allowing you to compute the contact times for
any given location on earth. Also, Rob van Gent agreed to host his extensive
transit of Venus bibliography on our website. There's still a lot of work to do
before all of his bibliographic entries are transferred (the Bibliotèque nationale de France
decided to change their permalinks on the Gallica
website), so please return in the next couple of weeks to see for new
additions. Together with the list of locations of historical observations, the
project's website now forms the most comprehensive resource for anyone
interested in the history of the transit of Venus. In the section "Getting
involved" you'll find the activities currently adopted by the Transit of
Venus Project. More will follow, but for now I would like to introduce to you
the three activities already open for all to participate:
Experimental
archaeology
What
did astronomers in the past actually see? What did the black drop look like
through an eighteenth century eyepiece, and could the aureole effect have been
observed at all, as is often claimed? By observing the 2012 transit of Venus
with antique telescopes, this project hopes to find an answer to these
questions. Contact: Randall Rosenfeld (r.rosenfeld@transitofvenus.nl)
Mark
that site!
Many
of the locations where astronomers observed the transit of Venus in the past go
unnoticed today. Still, these places tell exciting stories. This project's
objective is to relocate, inventory, restore and eventually mark significant
sites of past transit expeditions. Contact: Steven van Roode
(s.vanroode@transitofvenus.nl)
Measure
the Sun's distance
This
experiment - proposed originally by Edmond Halley, forming the driving force
behind the historical expeditions and re-enacted on a large scale in 2004 -
will be repeated again in 2012. This time, however, we will make use of modern
technology, much of which wasn't even available to us in 2004. Measuring of the
contact times and submitting your data will be facilitated by an easy to use
(and free) phone app. Contact: Steven van Roode
(s.vanroode@transitofvenus.nl)
Finally, I would like to draw your attention to our
fund-raising campaign. We need funds to start developing the phone app for you.
See
http://www.transitofvenus.org/education/video-new-media/217-phone-app
for more
details of the phone app. Please support the Transit of Venus Project by
donating $50, $100 or more! You can use the donate button on our home page to
contribute your gift. Donations are made to Astronomers Without
Borders and may be tax deductible. Just think of how wonderful it would be if
you could find and send your contact times with a free phone app on June 5 or 6
next year, without the need to leave the eyepiece. And hundreds of thousands of
others will benefit from your donation too!
In the mean time, if you haven't done it already, please
consider joining our group on Facebook:
http://www.facebook.com/home.php?sk=group_108400462513165
Sincerely,
Steven VAN ROODE (on
behalf of the Transit of Venus Project)
¤········Subject:
Received:
Dear
Masatsugu, The scene on the night I gave the talk
in the Rotunda. More anon,
Bill SHEEHAN
(
¤········Subject: Photos from
Received:
Bill SHEEHAN (
¤········Subject: Pluto telescope
Received:
Bill SHEEHAN (
¤········Subject: Saturn and GWS 2011.05.16
Received:
Dears, One month late, Saturn under correct conditions,
with a RGB and R+IR map of
the GWS at
these
longitudes:
http://astrosurf.com/delcroix/images/planches/s20110516-MDe.jpg
A R+IR
animation does not show any spokes, but the GWS rotating with the planet, and
Tethys and Rhea orbiting:
http://astrosurf.com/delcroix/videos/s20110516-MDe.gif
Montages
with brightness reinforced satellites:
http://astrosurf.com/delcroix/images/saturne_20110516_satellites.jpg
http://astrosurf.com/delcroix/images/saturne_20110516_rir_satellites.jpg
Regards,
Marc DELCROIX (
¤········Subject: Total Lunar Eclipse 110616
Received: Thu
Tomio AKUTSU
(
¤········Subject: FW: From bill sheehan
Received: Thu
------
Forwarded Message
From: Antoinette Beiser
Date:
To: Bill SHEEHAN
Subject: RE: From bill sheehan
Bill,
Thanks again for your wonderful talk. It was a huge hit with everyone. How
would you feel about allowing us to post it on You Tube for the benefit of our Friends. It’s entirely up to you. We don’t have the
bandwidth to post in from our website however an alternative would also be to
mail out DVDs to interested people. We have one request already. Tell me which
you’d prefer.
We
REALLY enjoyed having you as our speaker! Best,
Antoinette
Beiser
Development
Officer
1400
928-233-3216
Please remember Lowell Observatory in your
estate plans.
http://www.lowell.edu/friends/pls.php
From: Bill SHEEHAN
Sent:
To: Antoinette Beiser
Subject: From bill sheehan
Dear Jonathan, I enjoyed participating in the Friends
of Lowell annual event, and hope my talk met your needs. Let me know when it is on the web, as there
are some individuals who would probably find it of interest. Best wishes, Bill Sheehan
------ End of Forwarded Message
Bill
SHEEHAN (
¤········Subject: An informative image
Received:
Dear Dr. Minami, Bill, Bill, Christophe,
Attached
here is a very informative image by ESA Mars Express VMC. Argyre system and
Valles Marineris are explicitly shown on the dawn terminator which may give a
hint of the view by Mellish. Best Wishes,
Reiichi KONNAÏ (
¤········Subject: Re: Thank you for Stamps
Received:
Dear Masatsugu, You are welcome, I'm sorry it
took so long to send you the Schiaparelli post stamps, but finally I made it.
I never had so many telescopes for myself as
now, but I have no time to observe. Also seeing is constantly poor here from my
country house near Rome, this is why I hope to place a remote controlled
telescope in a better place and hopefully get back to do some planetary
imaging.
Hope you are well and please say hello to all
the CMO members for me. Best regards,
Giovanni
A. QUARRA SACCO (Roma, Italia)
¤········Subject: Proposal of a note for ISMO
Received:
Dear
Masatsugu, Reiichi and I are currently working on an
ISMO note that will deal with the Elysium case we've been talking about. I'm
currently reviewing images and it may be interesting... Best wishes
Christophe
PELLIER (
¤········Subject: Short lived loop prominence, June 12th
Received:
Hi
all, Following on from Dave's lovely prom image from
the 11th, there was a rather nice loop prominence visible on the western limb
for a short while yesterday too. Best regards,
Pete LAWRENCE (Selsey, the
¤········Subject: Saturn, storm and satellites 2011.05.24
Received:
Dears,
From 2 weeks ago, under average conditions:
http://astrosurf.com/delcroix/images/planches/s20110524-MDe.jpg
2
bright spots and a white streak are visible in the Northern trail,
the dark spot is setting in these images. The NtrZ is
bright in violet image. A montage with Saturn in RGB and satellites in R+IR
from 2 different movies, brightness enhanced. From left to right Dione, Tethys, a star above the rings plane, weak Mimas, Saturn, Enceladus and Rhea :
http://astrosurf.com/delcroix/images/saturne_20110524_rgb_satellites-MDe.jpg
Same
with Saturn in R+IR with more details:
http://astrosurf.com/delcroix/images/saturne_20110524_r_ir_satellites-MDe.jpg
Steady
skies,
Marc DELCROIX (
¤········Subject: Saturn 2011.05.17
Received:
Hi
all,
Catching
up a bit my backlog, I start with the less good set:
http://astrosurf.com/delcroix/images/planches/s20110517-MDe.jpg
Even
with this one the R+IR image was good enough to make out some details in the
GWS.
Clear
skies,
Marc DELCROIX (
¤········Subject: Saturn (
Received:
Hi
all, An image from Thursday evening. One of those
sessions where the image at capture didn’t look all that
good but sharpened well. Lots of stormy activity on this hemisphere with two
prominent brighter cores standing out from the general storm turbulence,
www.damianpeach.com/sat11/2011_06_02lrgb.jpg
Best
Wishes
Damian PEACH (Selsey, the
¤········Subject: Full h-alpha disk, June 3rd
Received:
Hi
all, Lots going on today with filaments, active regions and some decent
prominences on view.
Best
regards,
Pete LAWRENCE (Selsey, the
¤········Subject:
An artifact on the morning terminator?
Received:
Dear Dr. Minami,
when I was sweeping the terminator areas on the HST images
on the Web, I noticed a peculiar luminous projection over the dark side just
off the morning terminator around Phoenicis Lacus on
17 May 1997 HST image(ω=045°W).
What on Mars was that!? Was
it an artifact? Or
was it related to some solar activity?
Best Wishes,
Reiichi KONNAÏ (Fukushima,
Japan)
¤········Subject: Saturn (
Received: Thu
Hi
All, Here
is an image from May 25th. Plenty of turbulent activity
across the NTrZ at this longitude.
www.damianpeach.com/sat11/2011_05_25lrgb.jpg
Best
Wishes
Damian PEACH (Selsey, the
¤········Subject: 5 days of Sun -
Received: Thu
Hi
all, Something
a little different this time, a sequence of full disk mosaics arranged to show
the progression of features around the eastern limb of the Sun.
Images
were taken on consecutive days on May 21 -
Best
regards,
Pete LAWRENCE (Selsey, the