IWLOP #018 – Palus Somni & Proclus
Palus Somni, the "Marsh of Sleep," is a dark continental area west and south of Proclus. It's area is defined by an oblique impact that created a differential ray system. The unique character of this area is often best seen after Full Moon.
Location: 14.0 N 45.0 E Origin: Tectonic Size: 56 km, 40 km Rukl: 37, 26 Type: Palus, Crater & Ray System
Objects: Palus Somni, Proclus
Others Identified: Macrobius, Mare Crisium, Mare Tranquilitatis, Mare Anguinus, Lacus Bonitatis
Moon Phase: 1st Quarter (52.9% illumination)
Time: 7:18 PM ADT
Equipment: 10" Meade SCT, 4.7 mm
Transparency: Very Good (4)
Seeing: Very Good (4)
R1: Palus Somni is located on the NW side of Mare Tranquilitatis. Proclus is between Palus Somni & Mare Crisium. Proclus appears very white compared to its surroundings.
C1: Bright rays from Proclus go eastward into Crisium; none towards Palus Somni.
1- The extent of the differential rays east and west of Proclus were drawn in the sketch; I didn't used the IWLOP template.
2- Palus Somni had a different shade/hue in colour compared to surrounding formations. It also appeared rough in terrain with numerous ridges and/or craters.
3- Proclus was oval-shaped. It's NW rim appeared shallow and had numerous ridges that were very white. The floor appeared very pale grey.