IWLOP #013a – Eastern Mare Fecunditatis
A mare consisting of two contiguous, nearly round areas of dark Basaltic lavas. The northern part is three times larger than the southern and exhibits a number of dorsa. These lavas probably overlie an impact basin of pre-Nectarian age. Mare Fecunditatis covers 20 degrees of the lunar surface and may require various terminator angles for optimum views of all the features listed below.
Location: 4.0 S 42-62 E Origin: Impact and Volcanism Size: 990 km. Rukl: 48 Type: Basin
Objects: Dorsa Mawson, Dorsa Geike, Dorsum Cayeux
Observation 1:
Location: Home
Date: 2021-04-15
Time: 8:55 PM ADT
Equipment: 10" Meade SCT, 4.7 mm eyepiece
Magnification: x530
Transparency: Very Good (4)
Seeing: Good (3)
R1: Dorsa Mawson and Dorsa Geike were readily visible. Dorsum Cayeux could not be identified in this observing session.
Observation 2:
Location: Home
Date: 2021-04-20
Time: 9:04 PM
Equipment: 10" Meade SCT, 4.7 mm eyepiece
Magnification: x530
Transparency: not recorded
Seeing: not recorded
R1: Dorsa Cato, Dorsa Cushman and Dorsa Cayeux were identified. Cayeux appeared to have 2 small crater in or very near it. All three appeared as if they could be part of an ejecta field from Taruntius, with all three heading south.