Yesterday I sketched a region north of m.frigoris. I had the strong impression of a new, yet undiscovered crater between J.Herschel, Carpenter, Anaximenes and Philolaus. The m. frigoris makes a kind of border too, because it ist much different to the rough highland. I used my 4 inch refractor at 144x. The image is mirror reversed.
impression of an undetected crater between J.Herschel and Philolaus
Posted 07 January 2020 - 03:00 PM
I firmly believe that the bright flashes often seen randomly seen by lunar observers are meteorites crashing into the moon. It is very likely that your seeing a new crater. There might be an awful lot below the resolution of common instruments being formed on a very frequent basis. Well done for sketching and presenting this interesting speculation.
Posted 07 January 2020 - 03:09 PM
thanks for sharing this excellent sketch of an area I've been visiting yesterday evening too!
Posted 07 January 2020 - 03:26 PM
Are you speaking about the large low area among all these craters or something much smaller?
By the way a very fine sketch of the region.
Posted 07 January 2020 - 04:16 PM
Good sketch of Imression of an Undetected Crater between J.Herschel and Philolaus .
Posted 08 January 2020 - 12:24 AM
> Are you speaking about the large low area among all these craters or something much smaller?
Yes, he large area. It may be that the impression is not preserved to full extend in my sketch.
Posted 08 January 2020 - 01:10 AM
There are a few spots in that large low region where you can see regions that appear to be ghost craters.
Your sketch shows one pretty well.
Posted 08 January 2020 - 05:04 AM
I had a look at the LROC WAC resources on the internet (http://wms.lroc.asu.edu/lroc):
There are at least three structures that look a bit like shadow craters. Have a look left of the crater in the middle of the picture.
Edited by acr_astro, 08 January 2020 - 05:06 AM.
Posted 10 January 2020 - 06:08 AM
one thing that I like here at CN: Apart from enjoying the fantastic sketches, your contributions motivate me to dig a bit in the books to learn about the moon. I had a look to my copy of NASA SP-241 Atlas and gazetteer of the near side of the moon and to my Rükl atlas:
SP-241 shows on photo 152-2 (also available online: https://www.lpi.usra.../info.shtml?431) and the Rukl shows on plate 3 some ghost craters (north-)west of Anaximenes E.
Seems that I have missed them on my sketch https://www.cloudyni...-mare-frigoris/ of the same area - maybe due to poor seeing.
Thanks Uwe for heads up!
- Jeff Struve and Aquarellia like this