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Mercury 2011 March 19 David Arditti |
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Here is an image of Mercury recorded on Saturday afternoon at IR 742nm. I imaged at 807nm as well, but, maybe due to the longer exposure necessary, the results were less sharp.
There is a prominent bright spot S of the equator towards the limb. I have measured this position using WinJUPOS, and it corresponds to long 33, lat -12. This agrees well enough with the position of the brilliant ray crater Kuiper (long 31.5 lat -11.5), the brightest spot on Mercury.
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2007 February 06 Robert Katz |
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Not terribly accomplished but showing what I could clearly see with the small refractor. South is at the top in my views. The S cusp marking on the 7th was almost as noticeable as I've rendered it here. I forgot to add to the drawing that I also used a green filter on that date and that marking was particularly clear through it.
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2008 March 03 Mike Salway |
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Taken at 19 deg altitude, in fairly good seeing with my 12" newt + DMK21AU04 + Astronomik RGB filters. 100 frames were used in the stack.
I'm pretty sure there's an albedo feature in the red and green channels, like an "hour hand" of a clock, pointing to about the "4" position. I've re-stacked and recombined a number of times and it keeps appearing, so I'm guessing/hoping it's real but have no way of confirming it. The Starry Night simulator of Mercury at that time does show a dark albedo region at about that position, so it could be it. Happy for anyone to prove me wrong or right
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Bruce Kingsley, Mercury in conjunction with the Moon |
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I managed a wide field observation on the 6th when Mercury was close to conjunction with the 1.5 day old Moon. Mercury was at approx 10 deg above the NW horizon
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