Quark
19-01-2010, 09:06 PM
Hi All,
Hope you all don't get too bored with my Mars data as I am making a big effort over the next few weeks to capture enough hi res data to create an animation for a complete rotation of Mars at opposition.
Imaged Mars from before midnight to 2:23 am CSST. The seeing was reasonable at 5 to 6 / 10, good enough over the whole session to put together some RGB's.
The first images that I captured were with Mars at an altitude of only 19 degrees while my final capture was with Mars at approx 34 degrees, this is as high as it will get for my location this opposition.
Captured 6 IR avi's and 6 sets of R, G & B avi's. The final IR 807+nm images are stacks of the best 1,500 frames from the relevant avi while the RGB images use the best 2,000 R, G & B frames from each set.
Have posted my best RGB along with an RGB animation that uses the 6 RGB's that were captured. They cover 2 hrs of Mars rotation. The NPC in my RGB's is a little saturated.
Have also post 2 IR images beside labeled copies and a hi res IR animation containing all 6 IR images from this session, they cover just under 3 hours of Mars rotation. The dark collar within the NPC shows up quite well in these IR images.
I think this dark collar is likely the outline of an extensive sea of sand dunes that ring the NPC. They become visible as the methane ice frost that covers them in winter recedes. There is a HST images of this phenomena in one of my old Uni texts " The New Solar System" by Beatty, Petersen & Chaikin 4th Ed. The HST image was from March 1997 and shows the sand dunes, known as "Olympia Planita"
Thanks for looking, I think its time to get some sleep.
Sorry for posting so much Mars data, but, it is at opposition.
Regards
Trevor
Hope you all don't get too bored with my Mars data as I am making a big effort over the next few weeks to capture enough hi res data to create an animation for a complete rotation of Mars at opposition.
Imaged Mars from before midnight to 2:23 am CSST. The seeing was reasonable at 5 to 6 / 10, good enough over the whole session to put together some RGB's.
The first images that I captured were with Mars at an altitude of only 19 degrees while my final capture was with Mars at approx 34 degrees, this is as high as it will get for my location this opposition.
Captured 6 IR avi's and 6 sets of R, G & B avi's. The final IR 807+nm images are stacks of the best 1,500 frames from the relevant avi while the RGB images use the best 2,000 R, G & B frames from each set.
Have posted my best RGB along with an RGB animation that uses the 6 RGB's that were captured. They cover 2 hrs of Mars rotation. The NPC in my RGB's is a little saturated.
Have also post 2 IR images beside labeled copies and a hi res IR animation containing all 6 IR images from this session, they cover just under 3 hours of Mars rotation. The dark collar within the NPC shows up quite well in these IR images.
I think this dark collar is likely the outline of an extensive sea of sand dunes that ring the NPC. They become visible as the methane ice frost that covers them in winter recedes. There is a HST images of this phenomena in one of my old Uni texts " The New Solar System" by Beatty, Petersen & Chaikin 4th Ed. The HST image was from March 1997 and shows the sand dunes, known as "Olympia Planita"
Thanks for looking, I think its time to get some sleep.
Sorry for posting so much Mars data, but, it is at opposition.
Regards
Trevor