Hi All,
Imaged Saturn July 14th in good seeing covering 3 hr 5 min of Saturn rotation with continuous data capture other than when changing filters and rotating the dome.
Have resolved considerable small scale detail which I list here but I particularly note the very thin white cloud strip in the NEB very near the edge of the EZ. This strip has been visible for several years, since the ripples that impinge up into the NEB were first seen in the EZ.
The western most of the series of ripples has always had the highest amplitude and these data resolve its proximity to the thin cloud strip quite well. In my R data s2022-07-14_17-36-54_r_tba and 685nm IR data s2022-07-14_17-28_ir_tba I have included 200% insets in both of these particular data sets. The R data shows possible connection between the peak of the ripple and the cloud strip as does the IR data.
Measured detail in these data. A dark spot at approx Lat+64.4 L3 77.8, bright spots Lat+56.6 L3 25.1 and Lat+62 L3 92 Mid latitude bright spots approx Lat+29.3 L3 68 and Lat+30 L3 353.1. Three ripples impinging up into the NEB at approx Lat+14.1 L1 196.2, Lat+13.8 L1 170 and Lat+13.8 L1 142.5.
EZ bright spot Lat+8.8 L1 205.6, EZ compact bright spot Lat-3.7 L1 208.8 EZ bright elongated feature Lat-4.2 L1 163.5.
Multiple low contrast dark and bright features are resolved in the EZ; I have marked one of them to better provide a level of perspective relative to the other features.
Southern hemisphere bright spot Lat-30 L3 15.5. Note; there are multiple low contrast bright and dark features in the Southern hemisphere and I have marked one to provide some perspective to the other features, as was also the case in the EZ.
I continue my quest to hunt down the long lived AV but have had no luck. As I have such a large amount of data from this session I have created polar map animations in L3 but with the same L3 stipulated at the left margin of each map. Obviously any feature rotating at or near the L3 value will be stationary, ie the hexagon while other features do move a little over the approx 3 hr of the animations. Sadly I see no evidence of the AV the data points in my spread sheet over the last year or so showed a southward drift, the zonal wind velocity chart demonstrates that this drift means lower wind velocity so less energy. If it hasn’t already faded away maybe HST OPAL will still be able to resolve it.
All data from this session has been uploaded to PVOL with links here to the animations.
http://pvol2.ehu.eus/pvolimages/satu...85nmIR_tba.gif
http://pvol2.ehu.eus/pvolimages/satu...6-20_r_tba.gif
http://pvol2.ehu.eus/pvolimages/satu...26_rgb_tba.gif
http://pvol2.ehu.eus/pvolimages/satu..._polar_tba.gif
http://pvol2.ehu.eus/pvolimages/satu..._polar_tba.gif
Regards
Trevor
