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Object | Saturn |
Image type | image |
File size | 134.0 KB |
URL | s2023-07-11_16-23_ir_tba.png |
Observer | Trevor Barry |
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Comments: Imaged Saturn July 11th targeting a CM transit of the Lat-55 bright spot. Seeing was good so this session was extended and covers 2 hrs 59 min’s of Saturn rotation. Have good depth of small scale detail resolved particularly in 685nm IR and the R channel data. Detail resolved by latitude; Bright oval approx Lat+37.1 L3 161 (R data) Bright spot approx Lat+30.3 L3 156.8 (IR data) Bright compact spot on edge of ring shadow approx Lat-18.8 L3 149.2 (IR data) Bright spot mid SEB approx Lat-30.6 L3 133.7 (R data) Diffuse bright spot approx Lat-50.4 L3 123 (IR data) Bright spot approx Lat-51.2 L3 136.5 (IR and R data) Long lived bright spot approx Lat-55.1 L3 167.3 (IR data) I now have 7 data points for the Lat-55 bright spot including 1 from Fabio’s data over 99 days and the drift is approx –3.215 degrees / d. Of particular note; due to the extent of this session both the 685nm IR and R channel animations very nicely demonstrate the differential rotation within Saturn’s atmosphere. The 685nm IR animation covers 2 hrs 49 min’s of Saturn rotation with the Lat-18.8 compact bright spot seen overtaking the far south bright spots. The R channel animation covers 2 hrs 20 min’s of Saturn rotation and here the Lat-30.6 bright spot is overtaking the Lat-51 bright spot.
Observation 1 | |
Feature(s) | N/A |
Filter(s) | ir |
Date | 2023-07-11 16:23:00 |
Julian day | 2460137.1826388887 |
System I | 171.5518° |
System II | N/A |
System III | 97.87944° |
Illumination | 99.8% |
Phase angle | 4.400000095367432° |
Solar longitude | 38.3° |
Eq. diameter | 18.22″ |
Derotation | 0.0 min |