[Add observation]

Observation 1
Feature(s)	GRS Oval BA
Filter(s)	ch4
Date	2018-08-16 09:58:06
Julian day	2458346.9152777777
System I	74.933365°
System II	352.76425°
System III	243.77472°
Illumination	99.1%
Phase angle	10.699999809265137°
Solar longitude	315.5°
Eq. diameter	36.25″
Derotation	10.0 min