Solar & Planetary LtE Now in September 2021

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¤¤••••• Subject: Jupiter images, September 22nd 2021

Received: 26 September 2021 at 21:28 JST

 

Hi all,

There is a series of Jupiter images taken in infrared. There is a large sector of low altitude in the EZ (CH4/Y) and note a curious patch in the south polar hood in methane band.

 


 

Christophe PELLIER (Nantes, FRANCE)
Planetary astronomy and imaging

 

 

 

¤¤••••• Subject: Jupiter images September 16th 2021

Received: 26 September 2021 at 20:12 JST

 

Hi all,

Some images taken under fairly good seeing. With an "image spectrum" of all filters used that shows how the relative albedo of each belt and zone change in function of the wavelength.

 


 


 


 


 

Regards

 

Christophe PELLIER (Nantes, FRANCE)
Planetary astronomy and imaging

 

 

 

¤¤••••• Subject: Jupiter Image 25th Sept 2021

Received: 25 September 2021 at 19:02 JST

 

Finally a bit of reasonable seeing for me. I missed the spell on the 15th as I was away.

This taken with the ASI224MC colour camera.



Best Regards

Ian SHARP (Ham, nr.Selsey, the UK)

 

 

 

¤¤••••• Subject: Jupiter (September 16th)

Received: 24 September 2021 at 02:54 JST

 

Hi all,

Here is an image from September 16th. Oval BA on view.

 


http://www.damianpeach.com/jup21/2021-09-16-2207_9-RGBdp.jpg

 

Best wishes,

 

Damian PEACH (Selsey, WS, the UK)

http://www.damianpeach.com/

 

 

 

¤¤••••• Subject: Jupiter 2021-09-21 (UT)

Received: 23 September 2021 at 19:16 JST

 

Jupiter images on 21 September 2021.

 


 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Jupiter & satellites

Received: 23 September 2021 at 08:00 JST

 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Saturn (September 16th)

Received: 23 September 2021 at 03:20 JST

 

Hi all,

Here is an image from September 16th. Some moments of sharpness with the planet 20º high.

 


http://www.damianpeach.com/sat21/2021-09-16-2052_2-RGBdp.jpg

 

Best wishes,

 

Damian PEACH (Selsey, WS, the UK)

http://www.damianpeach.com/

 

 

 

¤¤••••• Subject: Jupiter 2021-09-20(UT)

Received: 21 September 2021 at 18:15 JST

 

Jupiter images on 20 Setember 2021.

 


 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Jupiter (September 15th)

Received: 21 September 2021 at 00:39 JST

 

Hi all,

Here is an image from Sep 15th. Poor seeing. The GRS is nicely seen.

 


http://www.damianpeach.com/jup21/2021-09-15-2159_3-RGBdp.jpg

 

Best wishes,

 

Damian PEACH (Selsey, WS, the UK)

http://www.damianpeach.com/

 

 

 

¤¤••••• Subject: Jupiter images September 5th 2021

Received: 19 September 2021 at 23:28 JST

 

Hi all

Some images from the 5th that I forgot to send. Good seeing.

RGB, Is, z', CH4, Y. The EZ bright patch is on the preceding limb.

 


 


 




Regards

 

Christophe PELLIER (Nantes, FRANCE)
Planetary astronomy and imaging

 

 

 

¤¤••••• Subject: Jupiter 2021-09-16(UT)  UV  CH4  IR(1000nm)

Received: 17 September 2021 at 16:44 JST

 

Jupiter images on 16 September 2021.

UV, CH4(890nm), IR(1000nm).

45cm (Newtonian)@Neptune-C II.

 

 

 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Jupiter 2021-09-16(UT)

Received: 17 September 2021 at 09:01 JST

 

Jupiter images on 16 September 2021.

 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Jupiter 2021-09-15(UT)

Received: 16 September 2021 at 13:40 JST

 

Jupiter images on 15 September 2021.

 


 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Jupiter 2021-09-13(UT)

Received: 15 September 2021 at 08:52 JST

 

Jupiter image on 13 September 2021.

 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Jupiter with Oval BA and impact site (Sep 13-14th)

Received: 15 September 2021 at 02:39 JST

 

Hi all,

Here is an image from last night from Rico and myself. A spell of fairly good seeing.

This was taken 1hr following the impact flash event at 22:39 UTC.

We did not capture the flash itself unfortunately. No visible marking across the cloud tops is seen.

Much like all the previous impact flash events no visible scar was left.

 


 

http://www.damianpeach.com/jup21/2021-09-13-2340_4-RGBeedp.jpg

 

Best wishes,

 

Damian PEACH (Selsey, WS, the UK)

http://www.damianpeach.com/

 

 

 

¤¤••••• Subject: Jupiter with GRS and Europa (Sep 13th)

Received: 14 September 2021 at 02:45 JST

 

Hi all,

Here is an image from last night obtained by Rico and myself using the 50cm telescope on La Palma.

A brief spell of reasonable seeing. The GRS is central surrounded by a grayish collar. Europa in transit at left.

 


 

http://www.damianpeach.com/jup21/2021-09-13-0056_0-RGBeedp.jpg

 

Best wishes,

 

Damian PEACH (Selsey, WS, the UK)

http://www.damianpeach.com/

 

 

 

¤¤••••• Subject: Planets in the 20th century

Received: 14 September 2021 at 00:13 JST

 

By the use of a 32cmNewtonian with a Teleris 2 CCD Camera.

 

 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Spectroscopy of Jupiter on 2021/08/31: albedo, colors and reflectances

Received: 13 September 2021 at 00:36 JST

 

Hi all,

Here are some results obtained with the Aply600 spectroscope on Jupiter.

 

To summarize:

 

1)                                                                                                                                   I have been able to obtain a full albedo spectrum by summing 9 individual spectra taken over the different domains of the planet (slit width = 23µm and 5"). No solar star was observed (too faint, it failed) and so the albedo has been found first by the spectrophotometry method (apparent magnitudes taken from a flux spectrum), then by calculating normalized magnitudes, and then the photometric albedos. Vmag was -2,88 that night (ephemerides: -2,86). More explanations are on the graph.
The comparison with the reference from Erich Karkoschka show a correct profile but a noticeably slope difference. This would more likely come from an error while correcting the instrument's response ; but despite looking for it I have not been able to find one.
I have also some data taken with photometric filters ; this could help me to evaluate if and how the slope is really wrong!

 


 

2)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         I'm adding a simple color spectrum of the planet, just like we see it through eyes and camera.

 


 

3)           Finally, I have tried to compare the relative individual reflectances of the different domains observed. The third graph correctly finds the NEB and EZ to be darker in the blue wavelengths; but the 5" wide slit is a bit too wide to discriminate the more narrow temperate domains. The relative high blueness of the NPR looks surprising but a clear haze can be observed over it on B and UV images and so it must be real...

 


 

Best regards,

Christophe

 

Christophe PELLIER (Nantes, FRANCE)
Planetary astronomy and imaging

 

 

 

¤¤••••• Subject: Jupiter 2021-09-10 (UT)

Received: 11 September 2021 at 11:41 JST

 

Jupiter images on 10 September 2021.

 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Solar image 2021-09-10 (UT)

Received: 10 September 2021 at 13:46 JST

 

Solar image on 10 September 2021.

 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 

 

 

¤¤••••• Subject: Jupiter images, 30th August 2021 - test of the Chroma Technology CH4 filter

Received: 9 September 2021 at 05:50 JST

 

Hi all,

This was mainly a test under poor seeing of the Chroma Technology CH4 filter, which looks to be as perfect of their UV (so-called "Bessel U") filter.

 

A comparison with my good old Idas CH4 filter shows an equal luminosity of the image... but with a noticeable higher contrast. This is due to the "square" transmission of the Chroma filter, while the IDAS presents lower transmission before, and after, the CH4 absorption band. On such a narrow band, the design of the transmission of a given filter is critical and will lead to noticeable differences on the performances.

 

Christophe

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

Christophe PELLIER (Nantes, FRANCE)
Planetary astronomy and imaging

 

 

 

¤¤••••• Subject: Jupiter 2021-09-07 (UT)

Received: 8 September 2021 at 09:50 JST

 

Jupiter images on 7 September 2021.

 


 

Best regards,

 

Tomio AKUTSU (Ibaraki, JAPAN)

 


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