Quote:
Originally Posted by Startrek
Jeff
Very good Martian images
It’s a difficult planet to image due to its size , the low surface brightness and colour
Great job, well done !!
Martin
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Thanks Martin
I think I may have to correct you , Mars has a very high surface brightness, hence why a small object in apparent size is so bright. Think of a planetary nebula of similar apparent size, like NGC 7009, the Saturn Nebula, at 20" X 15" is only mag 8 and for a planetary has a reasonably high surface brightness. That is also why it is possible to achieve high frame rates when imaging Mars, because it is so bright, looking at the planet for too long in an eyepiece with a larger aperture doesn't do your dark adaption any favours.
Cheers.