Jupiter Sept 10th, Ganymede + shadow, transit

[Quark]

Hi All,
Imaged Jupiter Sept 10th in fair to very average seeing. Started out at 6/10 and dropped off progressively over my, just over 3 hrs imaging session, to finish up at 5/10.

The rate that the temperature dropped off made my Peltier cooler invaluable for this session. With out it I doubt I would have captured any data worth processing.

The high pressure system that provided very good seeing 2 nights previously had moved on and I started to feel the effects of the front filling in behind it.

I have posted 4 RGB's from this session taken at 20 degree longitude CMII intervals. I was going to continue through to 220 degrees long to again record the Wesley Impact remnant but it would not have been visible in this level of seeing so finished with long 180 degrees.

The first image in this set is quite reasonable, in my opinion, but the seeing dropped of pretty steadily after it.

In the first image Ganymede is in transit.
In the second and third images Ganymede and its shadow are in transit.
In the fourth image some detail is visible on Ganymede probably albedo shading.

Thanks to Mike for explaining to me how to align the three channels for the moon and shadow.

Looking forward to the next high pressure system.

Thanks for looking.
Regards
Trevor

[Kevnool]

Great captures Trev.
Love the detail on Ganymede.
Cheers Kev.

[Lester]

I agree, thanks Trevor.:thumbsup:

[Quark]

Thanks Kev, the quality of this image set was effected by the really ordinary seeing but I reckon the first one came up all right. Must be nearly time for our next observing night Kev, maybe after the school hols.



Thanks Lester, I was pleased with how Ganymede turned out, hope your not getting blown away down there, we had a report on the ABC radio today about the winds being so strong that a tree came down in a school yard badly injuring an adult and some kids.

[Bigcrunch]

Trevor,
Four Greats images of Jupiter, with an high resolution and details; What instrument did you used to take these pictures : F/D= ?
In France , the height of Jupiter in the sky is less than 30°, very difficult to take a good image.

[Quark]

Thanks Olivier, great to hear from you, welcome to our forum. Actually, I am involved with one of your countrymen, Marc Delcroix, supplying data from electrical storms on Saturn to Dr Georg Fischer at the Austrian Academy of Sciences.

Glad you like these images but I have posted much better images than these over the last few weeks, the seeing was very average on this night.

I use a 16" F4.5 Newt, I have had it for about 14 years. It was originally a Meade Starfinder, but I have highly modified it. I built my own 27 point primary mirror cell and redesigned the entire rear end of the scope. I built my own secondary mirror spider & mount and heavily reinforced the wall of the scope tube to mount a JMI Moto Focus.

I built a Peltier cooling system for my primary mirror which has improved the quality of my images a great deal.

I designed and built a very heavy German Equatorial Mount and fitted it with an Anssen technologies dual axis drive & drive corrector by Peter Mellander.

I use a DMK 21AU04.AS,with an Orion filter wheel, Astronomik type II RGB filters on a Televue 3x Barlow.

My scope is permanently mounted in a two storey observatory, also designed and built by me. I am fortunate to live in the remote outback of Australia with a typical desert type environment, normally very low levels of water vapor, a high number of cloud free nights with very little light or air pollution other than the occasional dust storm.

Jupiter, at 11 pm local time, is currently at 72 degrees altitude.

Regards
Trevor

[bird]

Lovely work Trevor, well done again!

Bird

[Bigcrunch]

Thank you ,Trevor for all these technicals informations; I know M.Delcroix,
we're on the same french forum (astrosurf);
See you soon
Olivier