Around Grimaldi
Hevelius and Cavalerius
Illumination 96.7% - colongitude 68°
2003 Dec 06 - C8 at f/28 - ToUCam Pro - 20 frames - Registax
Two large craters situated north of Grimaldi near the western limb. Hevelius is the larger crater
Rima Sirsalis
Illumination 96.7% - colongitude 68°
2003 Dec 06 - C8 at f/28 - ToUCam Pro - 22 frames - Registax
The longest rille on the Moon. Only part of it is visible here
Byrgius
Illumination 96.7% - colongitude 68°
2003 Dec 06 - C8 at f/28 - ToUCam Pro - 25 frames - Registax
The small crater in the right crater wall of Byrgius (large crater lower left) is Byrgius A which is the source of bright rays at Full Moon
Montes Rook with Grimaldi and Byrgius - 18 Dec 2002
Illumination 99,3% - colongitude 84,6°
C8 at f/15 - Vesta Pro - mosaic of three images, each 8 frames stacked in Registax
Montes Rook is the long feature along the left edge. It is part of the ring mountains around Mare Orientale, only visible during favourable librations
Mare Orientale - 22 Nov 2002
Illumination 91,9% - colongitude 128,4°
C8 at f/6 - Vesta Pro - 15 frames stacked in Registax - wavelet filter
Mare Orientale is mostly hidden from view but it can just be seen during favourable librations. Had it been better visible Mare Orientale together with its ring mountains (Mts Rook etc) would have been a real show piece. It an immense 900 km diameter basin formed by an enormous impact in the Imbrian period (about 3,8 billion years ago).