here's the feature that helped me identify the crater in the previous post:
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| rupes altai 9/13/2021 02:54 UTC |
the distinctive curved white line is called rupes altai, a ridge that can be best seen in the lunar morning with the sun shining on it's face (5 days after the new moon), or in the lunar evening with it casting shadows (4 days after the full moon).
nearly 500 km long and 3 to 4 km high, it's the rim of a gigantic impact basin (mare nectaris-smooth area upper left in image below)
it terminates on the right hand side at the crater piccolomini
a wider view (click on image for full size):
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| rupes altai, lower right 9/13/2021 02:54 UTC |
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| rupes altai, rim of giant impact basin mare nectaris |
Image details:
camera ZWO ASI 290MM
filters: ZWO IR pass 850
(seeing was mediocre with the 850 filter clearly sharper than a Baader IR pass "685")
celestron 11" Edge HD, no barlow
East Bluff, CA
9/13/21 02:43-03:02 UTC
filters: ZWO IR pass 850
(seeing was mediocre with the 850 filter clearly sharper than a Baader IR pass "685")
celestron 11" Edge HD, no barlow
East Bluff, CA
9/13/21 02:43-03:02 UTC
moon waxing crescent 6.6 day old
FPS (avg.)=73
Shutter=12ms
Gain=251 (41%)
FPS (avg.)=73
Shutter=12ms
Gain=251 (41%)
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