The sketch was made from the backyard while looking through a 140mm OMC140
Thanks for watching.
Thanks!
Thanks, I did my best
Thanks, given the great seeing I had wished I'd done the observation with my refractor.( more contrast-power)
Thanks for the compliment.
Thanks, making the final sketch costs more time than the observation itself!! Even the sketch at the telescope costs less time (no color etc) The nice thing about the end-result of a sketch that it is an add-up of moments of good seeing. Moreover the sketcher is free to add more contrast to details
Thanks for clarification John. I read (on AF I believe) that it should be doable with small scopes, but all my attempts failed. Having clouds to enhance visibility makes sense.John Baars wrote: ↑Sun Dec 11, 2022 10:18 amThanks!
Some of the big volcano's on Mars were seen with the big refractors in the nineteenth century. It is possible to see them with smaller instruments if orographic clouds hang above the volcano. In that case a small white spot is seen. One doesn't actually see the volcano itself however. In 2012 I saw such a white spot on Mars with the 14 inchSCT of the public observatory I belong too. My Co-observator and I found out later that it was Elysium Mons.
During the 2020 Mars opposition, I was hunting for it from my backyard. I got lucky once during those many attempts with my 120mmapo refractor. It turned out to be possible, but it was at the limit. Attached is a sketch of that observation. With the OMC140, judging by the contrast difference I see with the 120mm refractor, this would have been impossible.
Mars Olympus Mons 16-10-2020 (340x318).jpg
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