Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 101  ·  NGC 5457  ·  NGC 5461  ·  NGC 5471  ·  NGC 5477
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M101 2 sessions with Sony A7RIII + Canon 600/4 + unguided SWSA GTI from Bortle 6 backyard, Michael Gehrisch
M101 2 sessions with Sony A7RIII + Canon 600/4 + unguided SWSA GTI from Bortle 6 backyard
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M101 2 sessions with Sony A7RIII + Canon 600/4 + unguided SWSA GTI from Bortle 6 backyard

Getting plate-solving status, please wait...
M101 2 sessions with Sony A7RIII + Canon 600/4 + unguided SWSA GTI from Bortle 6 backyard, Michael Gehrisch
M101 2 sessions with Sony A7RIII + Canon 600/4 + unguided SWSA GTI from Bortle 6 backyard
Powered byPixInsight

M101 2 sessions with Sony A7RIII + Canon 600/4 + unguided SWSA GTI from Bortle 6 backyard

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Description

Added a second session on M101, this time a clear and windless night, doubling subs and allowing me to test methods to improve tracking with the SWSAGTI. After first hour I noticed the stars were slightly triangle shaped. I loosened the clutch slightly and star shapes were better for the rest of the session, so I suspect over-tightening the clutch may have a negative imact on the star shapes, so will continue to monitor and evaluate this in coming sessions.

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M101 2 sessions with Sony A7RIII + Canon 600/4 + unguided SWSA GTI from Bortle 6 backyard, Michael Gehrisch