Comments: 10-frame sequence over 5 hours of the gathering of Jupiter's moons on 15th August. Seeing was terrible.

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Observation 1
Feature(s)	GRS Io Europa Ganymede Callisto
Filter(s)	colour
Date	2021-08-15 17:31:00
Julian day	2459442.229861111
System I	356.24512°
System II	196.77628°
System III	18.970394°
Illumination	100.0%
Phase angle	1.100000023841858°
Solar longitude	46.3°
Eq. diameter	49.01″
Derotation	0.0 min