Sunday afternoon, 19th of December of 2021 17:40h UTC, I had a clear night, zero clouds, and a great opportunity to capture a telescopic image of the C/2021 A1 (Leonard) comet from my backyard observatory (Astrocat) here in Prades (Tarragona).
Comet was around 5º above the horizon. Moon at 100%. I estimated the apparent magnitude for the core of the comet around m=5.50 to m=6.50 as I compared it with its nearby stars.
This image is an RGB composition with 3 single 60″ exposures (60″ for each channel). No calibration images were applied.
3 single 60″ images with R, G, B filters
RGB: (1,1, 1) x 60″ bin1
Not calibrated images
Total exposure: 180″
Moon at 100%
Image resolution: 1.46”/pixel
Date: 19th of December 2021.
Time: 17:40h UTC
Location: Astrocat Observatory (Tarragona, Catalonia – Spain).
FSQ85 + ASI294MM + SHO LRGB Baader filters – with ZWO EFW 7 pos
Guiding with ASI120MM and ZWO Mini Guide Scope
PIX, LR, PS, TPZ.