Sunday, September 16, 2018

Comet 21p tags M35

The morning of Sept 15, Comet 21p passed in front of open star cluster M35:

Comet 21p with M35. Image was processed to accentuate the green color.

Comet 21p with M35

My exposures spanned about 24 minutes. So, I put them together into an animated GIF to show the comets apparent motion over 24 minutes:

All photos were taken with a 3-inch refractor at F5. Exposure times and ISO settings varied, but my best results were with 1600 ISO at 30 seconds and 800 ISO at 60 seconds. Any longer, and I get too much light pollution. Still, I'm happy with what I can capture under my semi-urban sky.


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