Solar
& Planetary LtE Now for CMO/ISMO #62 (CMO
#436)
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necessarily cited in the PDF’s CMO LtE
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¤····Subject: Re:
Thank you for your excellent Note for CMO
Received:
Dear Masatsugu,
Many thanks for your compliments. You are welcome to correct the orientation of
the figures...
I will be more
rigourous next time ;)
I'm going to check the reference you are indicating.
Best wishes, I'm thinking about a next note for CMO 436....
Christophe
========================================
Le
25/06/2015 12:12, Masatsugu MINAMI a écrit :
Dear
Christophe,
Thank
you very much for the excellent Note for CMO #435. Reading it twice, I am very
impressed with the content. I think it is the first time for me to be very
conscious about the indication that the Terby crater is located at the northern
end of the south polar cap. It may nicely conform with the result given M
GIURANNA et al ʺPFS/MEX observations of the condensing CO2 south polar cap
of Marsʺ Icarus 197 (2008) 386‐402 (cf. page Ser2-1022 in CMO #353 -
Unfortunately though we have finished the edition but I think it is not yet
complete. The hyperlinks are not all right because the Adobe PDF we are using
is one of older editions, and so any linkage is sometimes fails. We intend to
replace it by a new one in a near future.
We are sorry but inform you that we employed “south is up” without your
permission on your Figures.
Thank
you again for your nice note, and look forward to your further 2013/2014 Note.
With
best wishes,
Masatsugu
========================================
Christophe PELLIER (
¤····Subject: Solar
Images 24-25-26-27-June-2015
Received:
Hi Guys The weather allowed a fair run of images AR 2371. I have
put an image from each imaging day onto a montage for quick reference to
changes during its journey across the disc. The image is quite large and will
take three ctrl +’s if you want a closer look. Seeing over the days was
variable with occasional glimpses of reasonable stability. Results from the
24th were best.
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Saturn:
equatorial spot ephemeris (and my own image of it from 2015.06.21)
Received:
Dears,
A spot in Saturn's equatorial zone has been observed
simultaneously by several observer on June 21st, here is my image of it under
average conditions:
http://www.astrosurf.com/delcroix/images/planches/s20150621i-21h36.7UT-MDe.jpg
It had been observed previously, I found several observations,
compute its drifting rate (confirmed by the pros) and prepare for you an
ephemeris of its central meridian transit (under bracket its longitude) -
observe between +/-2h from the time given:
WinJUPOS 10.1.15 (Saturn), C.M. transit times, 2015/06/24
23:42
Object longitude: L3 = 107,7° - 37,0743°/d * (T - 2015 May 20,5)
Time interval: 2015 Jun 20,0 ... 2015 Jul 31,0
Output format: Date UT (C.M. of System 3)
------------------------------------------------------------------------------
2015 Jun 20 03:55 ( 51°) 14:07 ( 35°)
2015 Jun 21 00:18 ( 19°) 10:29 (
3°) 20:41 ( 348°)
2015 Jun 22 06:52 ( 332°) 17:04 ( 317°)
2015 Jun 23 03:15 ( 301°) 13:26 ( 285°)
23:38 ( 269°)
2015 Jun 24 09:49 ( 253°) 20:01 ( 238°)
2015 Jun 25 06:12 ( 222°) 16:23 ( 206°)
2015 Jun 26 02:35 ( 191°) 12:46 ( 175°)
22:58 ( 159°)
2015 Jun 27 09:09 ( 143°)
2015 Jun 28 05:32 ( 112°) 15:43 ( 96°)
2015 Jun 29 01:55 ( 80°) 12:06 (
64°) 22:18 ( 49°)
2015 Jun 30 08:29 ( 33°) 18:40 ( 17°)
2015 Jul 01 04:52 ( 2°) 15:03 ( 346°)
2015 Jul 02 01:15 ( 330°) 11:26 ( 314°)
21:37 ( 298°)
2015 Jul 03 07:49 ( 283°) 18:00 ( 267°)
2015 Jul 04 04:12 ( 252°) 14:23 ( 236°)
2015 Jul 05 00:35 ( 220°) 10:46 ( 204°)
20:57 ( 188°)
2015 Jul 06 07:09 ( 173°) 17:20 ( 157°)
2015 Jul 07 03:32 ( 141°) 13:43 ( 125°)
2015 Jul 08 10:06 ( 94°) 20:17 ( 78°)
2015 Jul 09 06:29 ( 63°) 16:40 ( 47°)
2015 Jul 10 02:52 ( 31°) 13:03 ( 15°)
2015 Jul 11 09:26 ( 344°) 19:37 ( 328°)
2015 Jul 12 05:49 ( 312°) 16:00 ( 296°)
2015 Jul 13 02:12 ( 281°) 12:23 ( 265°)
22:35 ( 250°)
2015 Jul 14 08:46 ( 234°) 18:57 ( 218°)
2015 Jul 15 05:09 ( 202°) 15:20 ( 186°)
2015 Jul 16 01:32 ( 171°) 11:43 ( 155°)
21:55 ( 139°)
2015 Jul 17 08:06 ( 123°)
2015 Jul 18 04:29 ( 92°) 14:40 ( 76°)
2015 Jul 19 00:52 ( 61°) 11:03 (
45°) 21:15 ( 29°)
2015 Jul 20 07:26 ( 13°) 17:38 ( 358°)
2015 Jul 21 03:49 ( 342°)
2015 Jul 22 00:12 ( 310°) 10:23 ( 294°)
20:35 ( 279°)
2015 Jul 23 06:46 ( 263°) 16:58 ( 247°)
2015 Jul 24 03:09 ( 231°) 13:21 ( 216°)
23:32 ( 200°)
2015 Jul 25 09:44 ( 185°) 19:55 ( 169°)
2015 Jul 26 16:18 ( 137°)
2015 Jul 27 02:29 ( 121°) 12:41 ( 106°)
22:52 ( 90°)
2015 Jul 28 09:04 ( 74°) 19:15 ( 58°)
2015 Jul 29 05:27 ( 43°) 15:38 ( 27°)
2015 Jul 30 01:50 ( 11°) 12:01 (
355°) 22:13 ( 340°)
------------------------------------------------------------------------------
Send me your images (delcroix point marc at free point fr) so I
could measure them and follow its evolution !
Steady skies,
Marc DELCROIX (
¤····Subject: solar
images 19-22nd-June-2015
Received:
HI Guys Here are some images from the 19th and 22nd-June. Once
again on the paired Ha 14:18ut /white light 14:43ut image, you can see the
influence of the umbra-contacting Ha filaments, on the white light image as
“hooks” into the umbra.
The 14:15ut Prom image is a natural looking ones shot image from
the DS 90, as opposed to a composite of normal, or inverted images that I often
use in an effort to capture the high dynamic range.
AR 2367 looked a bit feeble on the 19th, but actually looked
healthier as it approached the limb on the 22nd.
I got carried away processing the
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: SOLAR
IMAGES 15-18TH-JUNE-2015
Received:
Hi Guys These images taken over the 15th 18th June start off with
AR2367 being the star of the show. Picking it up again on the 18th, it was a
lesser beast, and AR2371 was looking much more impressive, particularly the
flaring in Ha.
Compare the Ha image from 10:43ut with the white light image from
11:40ut, note how the filaments sweeping into ( or out of ) the umbra matches
the shape of the white light “intrusion/ light bridge” in the umbra.
Seeing was mostly very poor but as always over the course of the
days some reasonable seeing was out there. Having the scope running all day, I
am finding that cloud gaps are producing better seeing than a total blue sky, I
daresay because of the reduced radiation reaching the foreground. PM imaging
also has some good moments , these were more recognisable by Autostakkert than
my eye on the screen, so keep snapping was the order of the day. A 100Gb of
capture files for a few final images is typical.
One thing about having a lot of avis on my capture laptop drive, in
spite of plenty of free space Firecapture starts to falter on capture, with
filing lagging behind the “stop start” capture rate. Clearing the drive of
excess avis cures this.
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Re:
Received your note
Received:
Dear Reiichi,
Thanks once again for
the translation! I think I may have overlooked a bit Anthony's image :-/
however the angle of view is less favourable.
I think that the
trailing clouds above the orographic only happen later in the season - as they
are due to trade winds coming from the southern return of the summer Hadley
cell.... that will be onset around mid-spring. However we do not observed an
eastern trailing cloud in the case of Elysium as Masatsugu recalled in one last
note...
Best wishes,
Christophe
========================================
Message du :
Suject : Received your note
Dear Christophe,
I have started translating your 2014 Note #8 for the CMO Japanese
version.
Now I am translating your note and Bill's essay simultaneously!
Yes, contemporary imagers' performances are great, they are fighting
at the limit of optical resolution. Terby crater is just a near limit object.
Not only the imager, I feel, but also the analyst needs some image processing
in his/her eye/brain system in judging those delicate findings. I agree with
you that Christopher Go's
It's now the Martian season when the trailing orography of Elysium
Mons should emerge, but unfortunately Mars is just in conjunction which means
the probe data like MRO MARCI Weather Report, only means for us, will not be
transmitted back to Earth for several weeks because of telecommunication
failures. The Elysium Mons Orographic trailing should be eastward as some
sophisticated meteorological simulation models predicted.
Best Regards,
Reiichi KONNAI
========================================
Christophe PELLIER (
¤····Subject: Saturn
IR 20 June
Received:
Hi, all
A further IR capture
of Saturn from yesterday evening, when conditions, for once, were pretty
reasonable. High latitude disturbance evident. I took a wider field view than
normal for this capture and there are two moons detectable in the wide field
view that I could pick up(I havent checked for others yet and I didn’t align on
them though), but what a beautiful sight with the planet hanging in the the
vast blackness of space…….
Best regards,
¤····Subject: Jupiter
19 June
Received:
Hi, all
Kindly find attached
a late apparition RGB/IR image set from yesterday evening. jupiter is not
particularly well placed for me at the moment, but was nicely positioned near
the moon and I was taking a few lunar captures, so swung over to Jupiter.
The northern
temperate region seems to be quite reddish/brown at the moment, particularly in
the area near the dark red spot. Quite a dark extended area in the south polar
region.
I have also recently
purchased a Baader Planetarium set of filters and have been testing them out.
The IR 685 filter is giving some nice results(maybe this is understating
things- I am delighted with it!), including picking up the current high
latitude disturbance on Saturn. The red filter is also giving good results,
although I am struggling a bit with getting good green and blue captures(I am
using the dark blue filter, not the light blue).
Best regards,
¤····Subject: solar
images 8-9-11-June-2015
Received:
Hi Guys a lot of
images but the files are small. There were few nice double sunspot groups.
There was also a couple of small flare captured. I have processed these images
a little dark so as not to exaggerate the brightness of actual flare so showing
their true shape.
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Re:
How are you going? from Masatsugu Minami
Received:
Dear Masatsugu,
I will try to send
you my note tomorrow. Research work took a bit more time than expected - at
final it will be a note about the winter
Best wishes,
Christophe
---------------------------------------------------------
Le
Dear Christophe,
Thank you so much for your prompt reply. Yes, it will be
appropriate at this time if you kindly show us how the possible lee cloud of
Elysium Mons trails southward. In the 1970’s, Smith and Smith gave some
statistics of the Elysium cloud activity, where the seasonal cycle of the
Elysium cloud was not so different from the curve applied for Olympus Mons. At
that time they estimated no more than the densities of the cloud images in B
(during the period 1924~1969). However at present we should say we might be
able to derive much more nicer results. We are satisfactory if you will give in
#435 your further comprehensive analysis.
Thank for your kindness. I
am still at home at the same place after I retired in 2002. My mail address is
therefore identical with the one shown at the last line of the recent CMO/ISMO
(at the last page).
With best wishes,
Masatsugu
---------------------------------------------------------
Christophe PELLIER (
¤····Subject: For ISMO
Received:
Dear Masatsugu,
We are getting very excited now about the New Horizons flyby, so I
thought I would send a brief Q and A I did for Markus Hoitakanen (do you
remember him? He was at the Paris and Meudon events of 2009).
Hope all is
well with you.
All the very best,
yours,
Bill SHEEHAN (
（Note）：New Horizons is a NASA
space probe launched on 19 January 2006 to study the ninth planet Pluto, its
moons and one or two other Kuiper belt objects. It is designed to make the
first fly by the planet on
¤····Subject: solar
images 6-7-8-June-2015
Received:
Hi Guys These solar
images are mainly about the progress of AR 2362 . We have a wide field image
showing where they were located on the solar disc on the 7th, and also cameo
appearances of AR2360 and AR2361.
(There are more to
come from the 8th but this mail would have been got too large).
White light images
AP178T + 4x mag with stretched 3x TV Barlow, 2” Intes Herschel wedge
, Baader solar continuum filter and IR blocker. ZWO ASI 120MM-S
Ha
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Solar
Images and animation 3-4-June-2015
Received:
Hi Guys here are a
few images from the beginning of the month, including a late in the day
animation. I rarely point my scope west, but on the 4th, the sky was clearer pm
than am. I noticed a small flare on a new sunspot this rapidly morphed into a
duck at 14:41ut, and was actually changing shape during the 40 second
exposures. The flaring prominence was very bright even against the surface. I
continued to shoot avis over the next 20 minutes but fell asleep chin on hands
whilst wait for the last 15:01ut avi to capture ! Bit too cosy in my dome.
You can see trouble
brewing on the earlier 13:22ut Ha image.
I shot some white
light images AM and noticed a brighter halo around the sunspot AR2356 I have
been aware of these in the past and will have to watch out for them in the
future and take more notice.
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Saturn
2015.05.30/31 with satellites (good conditions)
Received:
Dears,
Two days after the nice May 28th night, seeing was a bit less good but still
nice, I could again get some nice images despite 28° elevation:
In infrared, with Enceladus, Tethys, Dione and Rhea, its such a beauty at the
eyepiece:
http://www.astrosurf.com/delcroix/images/s20150531i-sat.jpg
http://www.astrosurf.com/delcroix/images/planches/s20150531i-00h03.7UT-MDe.jpg
Red + infrared:
http://www.astrosurf.com/delcroix/images/planches/s20150530r-23h04.0UT-MDe.jpg
Average
quality RGB and color layers :
http://www.astrosurf.com/delcroix/images/planches/s20150530-23h40.7UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/s20150530r-23h38.6UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/s20150530g-23h40.7UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/s20150530b-23h42.8UT-MDe.jpg
Steady skies,
Marc DELCROIX (
¤····Subject: Saturn
2015.05.28 with polar perturbation and satellites
Received:
Dears,
For my second Saturn observation session this year, I had good seeing
despite a low elevation of the planet here (28° ... :( ). So I could image in
infrared the polar area, with the hexagon and its central vortex, and the
famous perturbation with its dark spot. Here are the images, first with a nice
wide field image thanks to the ZWO ASI174MM camera:
http://www.astrosurf.com/delcroix/images/s20150528-ir_sat.jpg
Now
the details:
http://www.astrosurf.com/delcroix/images/planches/s20150528i-23h43.8UT-MDe.jpg
Details
are a bit less visible in R+IR, the perturbation is rising on the left side:
http://www.astrosurf.com/delcroix/images/planches/s20150528r-22h35.4UT-MDe.jpg
RVB
and individual color layer, without any detection of the polar feature
(probably due to the low elevation of the planet) :
http://www.astrosurf.com/delcroix/images/planches/s20150528-23h16.9UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/s20150528r-23h16.9UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/s20150528g-23h19.0UT-MDe.jpg
http://www.astrosurf.com/delcroix/images/planches/s20150528b-23h14.9UT-MDe.jpg
Steady
skies,
Marc DELCROIX (
¤····Subject: Occultation
of Chi Leonis by Mars
Received:
Dear Masami --
This is to notify all observers that Mars will occult a bright star, Chi
Leonis, on
The event will be visible favorably from
As seen from Tokyo (latitude +35.6895 degrees, longitude +139.6917 degrees),
Mars will be 22 degrees above the eastern horizon with an azimuth of 97
degrees, and the Sun will be 18 degrees below the horizon. The duration of the
occultation will be 156 seconds, beginning at
As seen from
Mars will be at magnitude +1.75, with a solar elongation of 40 degrees in the
morning sky, and an apparent diameter of 4.1 arc
seconds. Chi Leonis is an F0 star of magnitude 4.63, or a fifteenth as bright
as Mars. It is also known at HIP 54182. Although a green or blue filter may
enhance the contrast between Mars and the star, the use of such a filter may or
may not enhance the quality of the data a particular observer obtains. Some
occultations by Mars have been measured by measuring the change in the combined
brightness of Mars plus the star, rather than trying to measure the star alone.
The technique that is used should depend on the observer's judgement, in view
of the instruments he has available.
The critical time of the observation, in which the atmosphere of Mars will
partially block the starlight, will last only about 3 seconds at disappearance
and reappearance. Reappearance will be in the illumination defect, so that the
star might be seen slightly separated from the terminator and be more easily
detected. However, the illumination defect will be only 0.16 arc seconds wide
at its widest point.
Phobos and Deimos will also occult the star, but these events will not be
visible at night from areas of Earth where there are known observers. Further
detail about the events involving Mars, Phobos, and Deimos is available at
https://groups.yahoo.com/neo/groups/IOTAoccultations/files/Mars%20%26%20its%20moons%20occult%20Chi%20Leonis%2018-Oct-2015/
including
more detailed path maps and detailed data on the locations of path limits. You
must join the IOTA Yahoo message group to access these files (joining is
easy). Alternatively, you are invited to obtain the information directly from
me by contacting me at rjvmd@hughes.net
.
The
computations for such data are difficult. Observers are asked to contact me
about their observations, unless thay have previously coordinated with a
interested astronomer.
With high regards,
Roger VENABLE (Mars Section,
A.L.P.O.)
Vice President, IOTA
¤····Subject: Re:
How are you going? from Masatsugu Minami
Received:
Dear Masatsugu,
Yesterday at lunch I was casually reading the last two CMO issues that I had
not time to read before. I was thinking into writing something complementary to
your note #07 about Elysium. The fact that the cloud is not trailing eastward
to the contrary of the Tharsis afternoon clouds is very interesting. Maybe we
can explain it by the difference of latitude, and the position of the Hadley
cell... if it sounds fine to you ?
The passing of Don was regrettable :( he was of course one the persons that
most inspired me when I was learning planetary astronomy (with you, needless to
say, and a few other ones). We dedicated our book "Astronomie
planétaire" to him.
Talking about this, I would like to send you a free issue of the book. Can you
send me your postal address ?
Please keep me informed about how you are going in general, Masatsugu...
With my best wishes,
Christophe PELLIER (
¤····Subject: Saturn
2015.05.27
Received:
Dears,
Start of Saturn season for me, gently under turbulent conditions, at 26°
elevation only :
http://www.astrosurf.com/delcroix/images/planches/s20150527r-22h29.5UT-MDe.jpg
Better
images from the days after should follow, once processed ...
Steady skies,
Marc DELCROIX (
¤····Subject: Jupiter
Received:
Hi, all
Kindly find attached
RGB/IR image set from this evening.
Best regards,
¤····Subject: Jupiter
2015.05.28 with Io and Europa
Received:
Dears,
Under good conditions at 40°elevation, Jupiter in IR with Io and Europa.
BA oval is setting (bottom right) preceded by a portion of STB, the South
Equatorial Band shows many fin details in two parallel bands, and there is a
large festoon at meridian in the equatorial zone, biting th North Equatorial
Band:
http://www.astrosurf.com/delcroix/images/planches/j20150528i-20h14.3UT-MDe.jpg
A short animation:
http://www.astrosurf.com/delcroix/images/planches/j20150528i-MDe.gif
Steady
skies,
Marc DELCROIX (
¤····Subject: Jupiter
2015.05.27
Received:
Dears,
Under so-so conditions, Jupiter in infrared with Ganymede in transit, the large
white spot in NTrZ is at CM:
http://www.astrosurf.com/delcroix/images/planches/j20150527i-20h12.6UT-MDe.jpg
Steadier
skies,
Marc DELCROIX (
¤····Subject: Solar
Images 21-30th-May-2015
Received:
Hi guys here are the results
of 4 “grab in loud gap” imaging sessions. Not much in the way of sunspots but
there was a feast of filaments. The large filament shown in the 27th-10:28ut
image became the large hedgerow prominence seen in the image from the 30th, as
it crested the “off” limb .
Best wishes
Dave TYLER (Bucks, the
www.david-tyler.com
Ham call G4PIE
¤····Subject: Re:
from bill sheehan: news
Received:
Dear Masatsugu,
It is always a pleasure to hear from you—though I read with
concern about the continuing heart troubles. Thank you for reminding me of your
article about Flamsteed vs.
Lately I have become very interested in the careers of the
hardworking observers in positional astronomy like Flamsteed, Bradley, and Airy
(and let us not forget Bessel who was perhaps the most gifted of any of them).
My recent visit to
I will come up with something for you—never fear.
I plan to be in
All the best, Bill
----------------------------------
On
Dear Bill,
Thank you very much for your timely
news. It’s good to hear from you after a while. It was interesting to read
about the nice trip to the northern
http://www.kwasan.kyoto-u.ac.jp/~cmo/cmomn4/CMO434.pdf
I remember some names of towns are
familiar to me. We have a CMO friend called Samuel Whitby in
http://www.kwasan.kyoto-u.ac.jp/~cmo/cmomn2/Cahier07.htm
in which I wrote “The statue of
Flamsteed at the old Greenwich Observatory is filled with the atmosphere of
anguish, but it is not only because of his illness but with the result of the
battle with the ‘fearful, cautious and suspicious’
Now I would like to ask you to write
some opening essay for CMO #435 (June issue) as you suggested. The dead line is
around 20 June.
Just a notice: As we remember, before
your opening essay “X-tracts from the ‘X’ files: W. H. Pickering and Percival
Lowell: from collaborators to rivals (to be continued)” in CMO #430 (January
2015 issue), you wrote “A Travel Journal; ASADA, MINAMI and SHEEHAN in
Thank you again for your kind
correspondence, and I look forward to your opening essay for #435 on any
subject.
With best wishes,
Masatsugu
PS: I am going to receive a
re-examination (cardiac catheterisation) in hospital on 5 June because I feel
angina attacks very often recently. I have already one stent in my coronary
artery.
---------------------------------------------
Bill SHEEHAN (