Quark
03-10-2014, 08:08 AM
Hi All,
Imaged Saturn Sept 26th. I have again captured the large bright EZ feature. Saturn is rapidly dipping toward the horizon now so there is not going to be many more opportunities.
The seeing was poor and the R channel was very ordinary but the image was more stable in IR. The EZ feature is well seen in my IR data s2014-09-26_09-26-06_ir_tba have included an inset with that image.
I now have data on the EZ feature from July 21st, Aug 21st, 24th, 27th & Sept 26th. This spread of data is over 67 days with a total cumulative L3 drift of 2595.3 degrees. The average L3 drift has been 38.7 degrees/day, approx 387 degrees every 10 days. Have attached my drift chart.
Imaged Saturn Oct 1st in good seeing for the alt, have very nicely resolved the anticyclone fossil from the Great Storm. I measure it to be at L3 178 degrees Lat + 42.7 degrees. It is well seen in my R channel s2014-10-01_09-10-48_r_tba, also in the polar projection of that data set. It can also be seen in my RGB s2014-10-01_09-17_rgb_tba as well as that associated polar projection.
Looking at my drift chart I couldn't help but reflect on the length of time this anticyclone has persisted, from its formation in Jan 2011 right through to now. Looking back through my 2012 & 2013 data I believe the actual size of this dark spot has remained rather constant right through 2014.
Regards
Trevor
Imaged Saturn Sept 26th. I have again captured the large bright EZ feature. Saturn is rapidly dipping toward the horizon now so there is not going to be many more opportunities.
The seeing was poor and the R channel was very ordinary but the image was more stable in IR. The EZ feature is well seen in my IR data s2014-09-26_09-26-06_ir_tba have included an inset with that image.
I now have data on the EZ feature from July 21st, Aug 21st, 24th, 27th & Sept 26th. This spread of data is over 67 days with a total cumulative L3 drift of 2595.3 degrees. The average L3 drift has been 38.7 degrees/day, approx 387 degrees every 10 days. Have attached my drift chart.
Imaged Saturn Oct 1st in good seeing for the alt, have very nicely resolved the anticyclone fossil from the Great Storm. I measure it to be at L3 178 degrees Lat + 42.7 degrees. It is well seen in my R channel s2014-10-01_09-10-48_r_tba, also in the polar projection of that data set. It can also be seen in my RGB s2014-10-01_09-17_rgb_tba as well as that associated polar projection.
Looking at my drift chart I couldn't help but reflect on the length of time this anticyclone has persisted, from its formation in Jan 2011 right through to now. Looking back through my 2012 & 2013 data I believe the actual size of this dark spot has remained rather constant right through 2014.
Regards
Trevor