IWLOP #009 – Endymion & Mare Humboldtianum

IWLOP #009 – Endymion & Mare Humboldtianum

Prominent Nectarian age mare-filled crater with wall reaching 4.5 km. To the south, Endymion points to Mare Humboldtianum, also known as "Humboldt's Sea," a limb feature best seen during favourable libration.

Location: 53.6 N 56.5 E     Origin: Impact and Volcanism      Size: 125 km.      Rukl: 7      Type: Complex Crater (CC) and Mare-Basin

Objects: Endymion, Mare Humboldtianum
Others Identified:  Atlas, de la Rue, Hercules, Keldysh, Lacus Temporis, Strabo, Thales

This session was conducted as part of the lunar observing session - Lunar Session - April 15, 2021.

Obsdervation #1:

Location: Home
Date: 2021-04-15
Time: 8:44 PM ADT
Equipment: 10" Meade SCT
Eyepiece: Explore Scientific 4.7mm with 82° FOV
Magnification: x530
Transparency: Good (3)
Seeing: Very Good (2)

R1: Endymion appeared elongated with a dark flat floor. NW rim looked ridged. A large flat area to its NW that looked shallower and about as large as Endymion. Lacus Temporis is to its SE.

C1: Mare Humboldtianum just visible on the Moon limb at the horizon. Could not view it all.
C2: not addressed at this time.

Observation #2:

Location: SCO
Date: 2026-05-23
Time: 9:03 PM ADT
Equipment: 10" Meade SCT
Eyepiece: 10mm (also tried 5mm but was too blown)
Magnification: x250
Transparency: Good (3)
Seeing: Good (3)

C2: Dark floor. Numerous craters around Endymion, some seemingly affecting the rim outer walls, as well as the surrounding terrain. Could also see more of Mare Humboldtianum due to a more favourable (not perfect) libration.

  

 

Details
Written by: Judy Black
Hits: 2314

Similar Items