IWLOP #005 – Langrenus
An Eratosthenian-aged crater with twin peaks, finely terraced walls and pronounced ejecta field. It stands out in an area that is heavily cratered. Note how older pre-Nectarian Vendelinus contrasts with the younger Langrenus.
Location: 8.9 S 60.9 E Origin: Impact Size: 132 km. Rukl: 49 Type: Complex Crater (CC)
Objects: Langrenus, Atwood, Bilharz, Noanobu, Webb, Luna 16 landing site
Others Identified: Acosta
Observation 1:
Location: Home
Date: 2020-05-25
Time: 9:15 PM ADT
Equipment: 6" Dobsonian, 9.7 mm eyepiece + x2 Barlow
Magnification: x250
Transparency: not recorded
Seeing: not recorded
R1: Langrenus appears to have 2 high central peaks casting shadows on its floor. The terraced walls were noticeable in the north and south walls. The ejecta field to the SW was certainly noticeable.
R2: In order of smallest to largest crater: Acosta, Naonobu, Atwood, Bilharz. Luna 16 landing site was to the west of Webb and crater B on the Mare Fecunditatis.
C1: The south floor of Langrenus is darker than that in the north, and its wall almost looks more like an ejecta field or lava flow/stream out of the south wall.
Observation 2:
Location: Home
Date: 2020-05-28
Time: 11:20 PM ADT
Equipment: 6" Dobsonian, 9.7 mm eyepiece + x2 Barlow
Magnification: x250
Transparency: Good (3)
Seeing: Good (3)
C2: Ejecta appears to be W and SW of Langrenus to Mare Fecunditatis, mostly SW.
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