Solar
& Planetary LtE Now in August 2022
Not every email is
necessarily cited in the PDF’s CMO LtE
To see the preceding ones, click
The latest is at the top
¤••••• Subject: Mars images - August
30, 2022
Received:
Sir,
Attached
are sets of Mars images from August 30.
Average seeing (3/5). Poor transparency for the entire session (variable density fog).
Regards,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220830/PGc30Aug22.png
Peter GORCZYNSKI (
¤••••• Subject: Mars Image Aug 29
Received:
Hello
Sending over todays images..
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220829/TWl29Aug22.png
Tim WILSON (
¤••••• Subject: Mars
2022/08/28-Kumamori
Received:
Mars
images on
Best
regards,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220828/Km28Aug22.png
Teruaki KUMAMORI (
¤••••• Subject: Mars images
- August 27, 2022
Received:
Sir,
Attached
are sets of Mars images from August 27.
Average
seeing (3/5) for the IR image, above average seeing (3/5+) for the RGB image.
Poor transparency for the entire session (in and out of
fog).
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220827/PGc27Aug22.png
Regards,
Peter GORCZYNSKI (
¤••••• Subject: Mars
2022/08/26
Received:
Hello,
here is my last night obs on the new apparition.
SPC
very small.
Excellent
conditions but low altitude:
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220826/MKd26Aug22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220820/MKd20Aug22.png
Manos
KARDASIS (
http://kardasis.weebly.com/mars-2022.html
¤••••• Subject: Mars Images Aug 26
Received:
Good
Day,
Sending over this mornings Mars images.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220826/TWl26Aug22.png
Tim WILSON (
¤••••• Subject: Mars: August
25, 2022
Received:
Sir,
Attached
are sets of Mars images from August 25.
Poor seeing (2/5), average transparency.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220825/PGc25Aug22.png
Regards,
Peter GORCZYNSKI (
¤••••• Subject: Mars: August
25, 2022
Received:
Hi,
I don't think I send you this image of Mars
Thanks,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220819/FMl19Aug22.png
Frank J MELILLO (
¤••••• Subject: Mars: August
25, 2022
Received:
Hi,
I have attached my image of Mars
Thanks,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220825/FMl25Aug22.png
Frank J MELILLO (
¤••••• Subject: Mars Images
Aug 24, 25 Tim Wilson
Received:
Hello,
Sending over the lastest Mars Images.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220824/TWl24Aug22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220825/TWl25Aug22.png
Tim WILSON (
¤••••• Subject: Mars -
August 23rd
Received:
Hi To
All!,
Here are my session on August 23rd. a session of Jupiter on the
23rd also.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220823/EMr23Aug22.png
Efrain MORALES RIVERA (
¤••••• Subject: Mars images
- August 24, 2022
Received:
Sir,
Attached
are sets of Mars images from August 24.
Average
seeing (3/5) good transparency.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220824/PGc24Aug22.png
Regards,
Peter GORCZYNSKI (
¤••••• Subject: Jupiter image (August 21st)
Received:
Hi all,
Here is
an image from the 21st. Some periods of good seeing amongst
the clouds.
http://www.damianpeach.com/jup22/2022-08-21-0052_3-RGBdp.jpg
Best
wishes,
Damian PEACH
(Selsey, WS, the
Web: http://www.damianpeach.com/
¤••••• Subject: Mars Images
Aug 22, 23
Received:
Hello,
Enclosed are images from Aug 22 and 23, 2022.
Seeing was good both days.
I
believe I have the necessary information on the images themselves
if you need more information included on future images please let me know..
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220822/TWl22Aug22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220823/TWl23Aug22.png
Thank
You,
Tim WILSON (
¤••••• Subject: Mars images
- August 21, 2022
Received:
Sir,
Attached
are sets of Mars images from August 21.
Good
seeing (3/5+) in average transparency for the IR image.
Very
good seeing (4/5) for the RGB set, with below average to poor variable
transparency.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220821/PGc21Aug22.png
Regards,
Peter GORCZYNSKI (
¤••••• Subject: Mars Sketch
19 August 2022
Received:
Hello,
I have
attached my most recent Mars observation
2022/08/19 0945 UT
CM: 256.3 Ls:
288 De: -9.1 Dia: 9.1"
35cm SCT f/11 @ 355x
ZWO ADC Filters: W30, 23A, & IL
S: 6-7/10 P T: 2-3/6 with
clouds
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220819/MRs19Aug22.png
Michael ROSOLINA (Friars Hill, WV)
¤••••• Subject: Jupiter
images, August 3rd 2022
Received:
Hi all,
Here is
an IR series from August 3rd.
Regards,
Regards,
Christophe
PELLIER (
Planetary astronomy and imaging
¤••••• Subject: Saturn
images, August 3rd 2022
Received:
Hi all,
Some
details are probably detected with the r' filter...
But I
should have made some animations!
Regars,
Christophe
PELLIER (
Planetary astronomy and imaging
¤••••• Subject: The colours of Jupiter
in 2021 (3)
Photometric spectra of
individual features and regions
Received:
Hi all,
Here is the last topic from my study.
North-South
scans work wonderfully to measure the global state of the planet, but are not
suited to measure individual features such as the GRS. In order to produce data
about them, I have experimentated a second method, which is producing
photometric spectra of some precise regions of the globe, equivalent to a
spectroscopic analysis, but with only a few points.
Values
are simply found by measuring, when they are on the central meridian, the ratio
of the brightness of the feature / the brightness of the whole globe, X the
geometric albedo of the planet. Beofre that, the brightness of the individual
feature is recalculated to find the brightness it would present, if it had the
same geometric surface as the globe. By "brightness", I understand
the intensity of the feature/globe measured on the photometric, unprocessed,
image through a software (IRIS).
This
method does not only work for individual spots, but also for belts or zones
providing that they present a rather homogeneous aspect throughout all the
longitudes. For example, in 2021, it is possible to measure the difference in
albedo/color of the two parts of the NEB.
Because
the absolute values measured inside the CH4 band are, by nature, very small in
comparison with the other bands, I have made a specific graphic.
The reason
why most of the values look to be much brighter than the spectroscopic albedo
from Karkoschka (grey profile), is simply because the value for the whole globe
includes the light gradient from center to limb. Measuring features on the CM
leads to much higher values, in general.
As for
any analysis, this way to produce results also suffers from limits:
It is
less relevant for belts or zones that are not homogeneous throughout all the
longitudes. For that reason, there is no graph for the SEB, for example.
Values
are not corrected for the gradient of light between the equator and the poles.
This means that it is only wise to compare date inside a given domain in
latitude, but we should be careful when trying to compare values taken from
different domains if they do not benefit from the same angle of illumination by
the Sun.
Some
measurements have been made when features where quite away from the central
meridian. A coefficient has been measured to correct the data in this respect,
considering that the photometric variation of the feature when turning from
limb to CM was the same as its domain of origin ; but
of course, in the reality, this might not be exactly the case. This could have
led to errors, but I believe that they are reasonable.
Finally,
I have made a few attempt at measuring values from
past apparitions, to compare, when features presented a widely different
aspect. I present two that were quite obvious, but some of the results I have
obtained in this respect were mixed. So take that with caution, of course.
I hope
to see some of you at the EPSC to discuss this, and many other things :)
Regards,
Christophe
PELLIER (
Planetary astronomy and imaging
¤••••• Subject: Mars: August 19, 2022
Received:
Hi,
I have attached my image of Mars
Best,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220819/FMl19Aug22.png
Frank J MELILLO (
¤••••• Subject: Jupiter images (August
15th)
Received:
Hi all,
Here is
an image from the 15th.
Very poor
transparency allowed only a handful of captures before clouds ended play.
Europa
alongside the planet.
http://www.damianpeach.com/jup22/2022-08-15-0333_1-RGBdp.jpg
Best
wishes,
Damian PEACH
(Selsey, WS, the
Web: http://www.damianpeach.com/
¤••••• Subject: Mars images - August
16
Received:
Sir,
Attached
are sets of Mars images from August 16.
Very
good seeing (4/5+). Average transparency.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220816/PGc16Aug22.png
Regards,
Peter GORCZYNSKI (
¤••••• Subject: Mo mars
Received:
Mars
images from on 3 May to on
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220808/Mo08Aug22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220805/Mo05Aug22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220719/Mo19July22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220611/Mo11June22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220608/Mo08June22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220601/Mo01June22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220527/Mo27May22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220503/Mo03May22.png
Best
regards,
Yukio MORITA (
¤••••• Subject: Mars images - August
15
Received:
Sir,
Attached
are sets of Mars images from August 15.
Very
good seeing (4/5). Good transparency.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220815/PGc15Aug22.png
Regards,
Peter GORCZYNSKI (
¤••••• Subject: Mars: August 14, 2022
Received:
Hi,
I have my latest images of Mars
Thanks,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220814/FMl14Aug22.png
Frank J MELILLO (
¤••••• Subject: Mars images - August
14, 2022
Received:
Sir,
Attached
are sets of Mars images from August 14.
Very
good seeing (4/5+). Good transparency.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220814/PGc14Aug22.png
Regards,
Peter GORCZYNSKI (
¤••••• Subject: Jupiter
images (August 12th, 13th)
Received:
Hi all,
Here
are some images from Aug 12th and 13th.
Seeing
not good on either night but enough for some results.
The
14th seeing was too poor to take anything.
http://www.damianpeach.com/jup22/2022-08-12-0327_0-RGBdp.jpg
http://www.damianpeach.com/jup22/2022-08-13-0236_6-RGBdp.jpg
Best
wishes,
Damian PEACH
(Selsey, WS, the
Web: http://www.damianpeach.com/
¤••••• Subject: The colours
of Jupiter in 2021 (2) North-South scans of all bands
Received:
Hi all,
Here is
the second part of my little study.
Once
the global albedo of the planet has been calculated, it is possible to exploit
the values in different ways. One is to retrieve the photometric profile of
Jupiter from one pole to the other, relevant because of the banding pattern,
and scale it against the albedo value. The best way to do this would be to
measure the profile at several longitudes, in order to average the local
variations that still exist. However, for a given observer from an average
observing site (me...) it can be difficult to obtain enough images to do so. In
order to face this problem, it is possible however, to decide that a given face
of the planet can be judged as "representative" of the global state
of its atmosphere (especially, having the GRS at the central meridian is to be
avoided!).
Another
way to deal with this is to retrieve the profile by "misusing" a software dedicated to spectroscopy. Such softwares can
measure a wider range of longitudes and not a single line (see the figure
attached). This will smooth a bit local variations.
The
profile is calibrated by finding the value of a given detail, such as the
equatorial band, or any belt/zone. I will explain how I did that in the third
message.
Below
are the figures. In 2021, the planet has experimented
a very strong drop in albedo of the whole system I, with an especially dark
equatorial "pseudo band". In comparison with a more
"normal" whitish state, the drop in albedo in blue light represents
around 3/4 points of albedo (from ~80% to ~45%) which looks quite a lot.
In the meantime,
the equatorial band reached a very high albedo value in the CH4 band, around
12% (starting from an albedo of 0,06 or 6%). This is a now identified
correlation between extreme darkness in UV/bright CH4 value, that points at a
particularily high structure.
I also
propose two coefficients of colors:
1) B
minus Rc : this will measure how much light is
absorbed when passing from red (a color where the albedo of the planet is more
steady) to blue, the wavelength where the most profund variations of albedo are
recorded. This is an index to evaluate the variations of colors of belt and
zones from a period to another.
2) U
divided by B: this tries to reveal special episodes of strong yellow/orange
coloration. In the UV, such event will traduce themselves
into a superior degree of absorption in comparison with the adjacent (and
relatively close-looking) blue band. In 2021, the equatorial band, inside the
EZ, shows this behavior. So would do the red spots sometimes (but this will be
measured with another method).
Here is
a link to my EPSC poster abstract in
On the
third (and last) message, I will send results from photometric spectra of
individual features.
Christophe
PELLIER (
Planetary astronomy and imaging
¤••••• Subject: Saturn
images, August 2nd 2022 - Details detected with animations
Received:
Hi all,
Here
are the results from the excellent night of August 2nd.
Animations
built with the BP642 filter revealed some details, especially a dark spot on
the southern winter hemisphere...
The
current white polar spot is also visible on the image taken with the ASI462MC.
Regards,
Christophe
PELLIER (
Planetary astronomy and imaging
¤••••• Subject: Jupiter
image (August 11th)
Received:
Hi all,
Very
poor seeing on the 11th meant only this near IR image was possible.
http://www.damianpeach.com/jup22/2022-08-11-0231_5-IR642dp.jpg
Best
wishes,
Damian PEACH
(Selsey, WS, the
Web: http://www.damianpeach.com/
¤••••• Subject: Jupiter
double transit (August 9th)
Received:
Hi all,
Here is
an image from August 9th showing a double shadow transit of Io and Ganymede
with both moons alongside.
http://www.damianpeach.com/jup22/2022-08-09-0214_1-RGBdp.jpg
Best
wishes,
Damian PEACH
(Selsey, WS, the
Web: http://www.damianpeach.com/
¤••••• Subject: Mars images
- August 7, 2022
Received:
Sir,
Attached
are sets of Mars images from August 7.
Average
seeing (3/5). Below average transparency (hazy thin clouds).
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220807/PGc07Aug22.png
Regards,
Peter GORCZYNSKI (
¤••••• Subject: Mars M220810
ishibashi
Received:
Mars
image on
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220810/Is10Aug22.png
Best
regards,
Tsutomu ISHIBASHI (
¤••••• Subject: Mars -
August 5, 6, 8th
Received:
Hi To
All!,
Here
are my session on August 5th, 6th and 8th.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220805/EMr05Aug22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220806/EMr06Aug22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220808/EMr08Aug22.png
Efrain MORALES RIVERA (
¤••••• Subject: The colours
of Jupiter in 2021 (1) Geometric albedo of the planet in various bands
Received:
Hi all,
I'm
going to send a few messages regarding the results I have obtained for my
personal research, which is the measurement of the variations of Jupiter's
colours. This idea had been suggested by John Rogers during the 2018 JUNO
meeting in
This
first message presents the method and results I have obtained when trying to
calculate the geometric albedo of the planet - basically the values obtained
measure how much sunlight the planet is able to reflect from the amount it
receives (see the links to get more details if needed).
Usually
those values are calculated against non-variable stars, but this method can be
tough to master, especially if the planet is found at a low elevation in the
sky, as this was the case for me during the last years. During the EPSC 2019,
Dr Jeff Morgenthaler from the Planetary Science Institute suggested me to try
to find the results from the galilean satellites, and
not stars. The point is that if galilean moons are not
steady sources of light as will be stars, their locations very close to the
planet will eliminate many sources of errors, while their own variations can be
predicted at least to a reliable amount.
To my
own surprise, the results obtained from that idea led to quite accurate
results, considering the modest ambition of this amateur work.
Here
are a links to fully understand how I processed the method if needed:
Galilean
Moons-based photometry for Jupiter (EPSC 2022 oral intervention)
The
colours of Jupiter in 2021 (EPSC 2022 poster intervention)
Links to the method from my Astrosurf website:
GALILEAN
PHOTOMETRY FOR U, B and V BANDS
GALILEAN
PHOTOMETRY FOR R AND IR BANDS
GALILEAN PHOTOMETRY FOR JUPITER: RESULTS AND DISCUSSION
The
only result that has not been correctly measured with these methods is the
albedo of Jupiter in Ultraviolet. For this, I'm sending as well a corrected
result from the spectroscopic observation I made in
For
2021, the results look to correctly measure a noticeable drop of the planet's albedo
in the short wavelengths, compatible with the great darkening of the whole
system I observable in images.
On the
next message, I will send results from photometric north-south scans for all
the observed bands.
Christophe
PELLIER (
Planetary astronomy and imaging
¤••••• Subject: Re: Jupiter
images on August 2nd, 2022, correction of CH4 image
Received:
Hi all,
I'm
sending a new processing of the CH4 image with correct registration, that shows
that the BA aspect, although not completely homogeneous, is not that split !
Regards,
Christophe
PELLIER (
Planetary astronomy and imaging
¤••••• Subject: Jupiter
image (August 7th)
Received:
Hi all,
Here is
an image from August 7th.
Some brief
moments of good seeing at times yielded a fine view of the GRS.
The
turbulent STB/STropBand sector p. the GRS is wonderfully complex.
Will be
interesting to see how this develops further.
http://www.damianpeach.com/jup22/2022-08-07-0313_1-RGBdp.jpg
Best
wishes,
Damian PEACH
(Selsey, WS, the
Web: http://www.damianpeach.com/
¤••••• Subject: Mars 2022/08/08-Kumamori
Received:
Mars
images on
Best
regards,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220808/Km08Aug22.png
Teruaki KUMAMORI (
¤¤••••• Subject: Jupiter
images on August 2nd, 2022, my best series so far
Received:
Hi all,
Here
are some images taken under exceptional seeing on August 2nd.
Certainly
my best B and Violet images so far of the planet!
The GRS
looks to have darkened slightly since last year. Oval BA presents a curious
"split" aspect in CH4, that looks to be visible as well on I, z', and
Y images... ?
Regards,
Christophe
PELLIER (
Planetary astronomy and imaging
¤¤••••• Subject: Jupiter
image (August 6th)
Received:
Hi all,
Here is
an image from August 6th.
Europa alongside with its shadow in transit.
http://www.damianpeach.com/jup22/2022-08-06-0340_2-RGBdp.jpg
Best
wishes,
Damian PEACH
(Selsey, WS, the
Web: http://www.damianpeach.com/
¤¤••••• Subject: Jupiter UV
images, July 30th 2022
Received:
Hi all,
Here
are some UV images of Jupiter taken through 3 different filters; the Chroma
Bessel U, the Astrodon Sloan u'/UVenus, and the new Baader Sloan u'.
Although
it looks subtle, I think that the fading Equatorial band that was so dark in
2021 can still be barely detected through the two u' filters, especially the
Baader which is the "deepest" one.
Also
added is a B and RGB images.
Regards,
Christophe
PELLIER (
Planetary astronomy and imaging
¤¤••••• Subject: Saturn UV images on
July 30th, 2022
Received:
Hi all,
Here
are two UV images of Saturn taken with two different filters: the Chroma Bessel
U, and the Astrodon Sloan u' (which I suspect to be
identical to the UVenus).
The u'
filter looks to show the same pattern, but with slightly increased contrast.
Regards
Christophe
PELLIER (
Planetary astronomy and imaging
¤¤••••• Subject: Mars images 2022 July 20 - August 4
Received:
Dear
all,
Sending
you my first Mars images for this season, obtained with my home built 52
cm Newtonian at Lindby Observatory (K60),
Sorry
if you receive some of these images a second time; I have updated the send list
to ensure all email addresses are correct.
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220804/JWr04Aug22.png
Best
regards,
Johan WARELL (
¤¤••••• Subject: Mars: August
4, 2022
Received:
Hi,
I have attached my latest images of Mars
Thanks,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220804/FMl04Aug22.png
Frank J MELILLO (
¤¤••••• Subject: Mars,
Jupiter and Saturn, 2022 July 20, 28 and 29
Received:
Dear
all,
I have
happily made my first observations of Saturn, Jupiter and Mars for this season,
submitted here to your galleries and archives.
I am
using my 527 mm Newt @f/15 at Lindby Observatory with Pierro Astro ADC, ASI462MC
camera, NIR block filters and CH4 filter.
The
planets are still low from 55 deg north and thus strongly susceptible to
seeing, but altitude is steadily increasing for all three of them ;)
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220720/JWr20July22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220728/JWr28July22.png
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220729/JWr29July22.png
All the
best,
Johan WARELL (
¤¤••••• Subject: Mars M220802 ishibashi
Received:
Mars
images on
Best
regards,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220802/Is02Aug22.png
Tsutomu ISHIBASHI (
¤¤••••• Subject: Mars M220731 ishibashi
Received:
Mars
image on
Best
regards,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220731/Is31July22.png
Tsutomu ISHIBASHI (
¤¤••••• Subject: Mars
2022/08/01-Kumamori
Received:
Mars
images on
Best
regards,
https://www.kwasan.kyoto-u.ac.jp/~cmo/cmons/2022/220801/Km01Aug22.png
Teruaki KUMAMORI (
¤¤••••• Subject: Jupiter
image (July 30th)
Received:
Hi all,
Some
brief moments of fair to good seeing on the 30th allowed a better result than
previously.
Oval is
BA is seen at lower left. Many complex spots along the STB latitudes paints a rather chaotic picture across this region.
http://www.damianpeach.com/jup22/2022-07-30-0331_8-RGBdp.jpg
Best
wishes,
Damian PEACH
(Selsey, WS, the
Web: http://www.damianpeach.com/