Comments: Note the large dark circular spot in the NEB.

[Add observation]

Observation 1
Feature(s)	N/A
Filter(s)	CH4
Date	2023-01-05 10:28:00
Julian day	2459949.936111111
System I	352.46198°
System II	279.23447°
System III	236.55043°
Illumination	99.1%
Phase angle	11.199999809265137°
Solar longitude	92.3°
Eq. diameter	38.81″
Derotation	0.0 min