Comments: Imaged Saturn March 31st in goodish seeing at all wavelengths. The 685nm IR data faintly resolves the 2010 GWS AV, this feature has quite unique structure insofar as the dark spot (the AV) is embedded in a bright annulus, this was well demonstrated last year in the HST data from July 4th & 5th and also in my amateur data. I measure the AV to be at approx Lat+43.1 L3 294.9 which is in good agreement with my ephemeris. This is my first data point for the AV this apparition, 125 days since my final data point from 26/11/2020. Also in 685nm IR I note a small bright spot at approx Lat+30.1 L3 273.3 both the AV and mid Lat bright spot are marked in my 685nm IR animation. Considerable banding structure is resolved in all data with the North Polar hexagon being best seen in the IR data, sadly the reduction in the apparent tilt of the planet has probably brought to a close any possibility of further accurate measurements of the hexagon vertices. Both the R and RGB data resolve the large amplitude ripple on the edge of the EZ impinging up into the NEB, there may be two small ripples preceding it but the large ripple is resolved and best seen in RGB near the F limb.

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Observation 1
Feature(s)	N/A
Filter(s)	rgb
Date	2021-03-31 19:43:00
Julian day	2459305.3215277777
System I	208.81563°
System II	N/A
System III	287.58972°
Illumination	99.8%
Phase angle	4.900000095367432°
Solar longitude	12.4°
Eq. diameter	15.84″
Derotation	0.0 min