[Add observation]

Observation 1
Feature(s)	GRS oval BA Io
Filter(s)	l
Date	2024-02-01 17:30:00
Julian day	2460342.2291666665
System I	191.43547°
System II	5.071914°
System III	66.66585°
Illumination	99.0%
Phase angle	11.399999618530273°
Solar longitude	128.1°
Eq. diameter	39.63″
Derotation	14.0 min