[Add observation]

Observation 1
Feature(s)	GRS and Callisto above
Filter(s)	rgb
Date	2019-08-08 20:16:10
Julian day	2458704.3444444444
System I	276.43945°
System II	347.09546°
System III	333.12006°
Illumination	99.299995%
Phase angle	9.600000381469727°
Solar longitude	343.7°
Eq. diameter	41.82″
Derotation	0.0 min