IWLOP #025 – Mare Nectaris ("Sea of Nectar")

The smallest of the major circular maria at 350 km across, it formed about 3.92 billion years ago. Even though Mare Nectaris is relatively small compared to other large basins, it still covers over 10 degrees of the lunar surface and may require various terminator angles for optimum views of all the features listed below. The absence of rilles may relate tot he relative thinness of lava in this mare.

Location: 15.0 S 40-30 E     Origin: Impact and Volcanism      Size: 350 km      Rukl: 58, 47     Type: Basin

Objects: Mare Nectaris, Bohnenberger, Rosse, Beaumont, Daguerre
Others Identified: Capella, Fracastorius, Isadoris, Mädler, Theophilis

Location: Home
Date: 2021-05-17
Time: 9:30 PM ADT
Equipment: 10" Meade SCT, 4.7 mm eyepiece + x2 Barlow
Magnification: x1060
Seeing: Excellent (5) 
Transparency: Very Good (4) 

R1: Wrinkle ridges on eastern areas of Mare Nectaris and west of Bohnenberger are almost parallel to Montes Pyrenaeus. Arcurate rilles not evidenced.

C1: Bohnenberger is west of the lower half of the Montes Pyrenaeus. Rosse is slightly off-centre of the Mare and it appears that its ejecta runs north-south with some going eastward. Beaumont (west of Fracastorius) looks to have its northern rim eroded; couldn't see features on its floor.
C2:  Daguerre at this point in the lunation appeared almost as a ghost crater. However, the ejecta ray from Mädler goes through one of the craters just inside Daguerre's eastern rim, and that helped identify Daguerre's location.

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