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C/2021 A1 Leonard

Object : Comet, C/2021 A1 Leonard
Coordinates/Direction : -
Object size : -
Object magnitude : -
More to know : You can read more about the comet on Seiichi Yoshida's homepage: comet/ catalog/ 2021A1/ 2021A1.html

Comet's light curve:

Comet Leonard C/2021 A1, light curve 2021 Credit: software 'Comet for Windows' from Seiichi Yoshida

The magnitude of the comet around the days I photographed it.

2021-12-07, Leonard

Comet C/2021 A1 Leonard
Date : 2021-12-07
Time (UT) : 00:47 to 03:18
Mount : SkyWatcher HEQ5, belt modified, low rider
Guide : QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Field (FOV) : 6.8x4.5o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 6o C above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system: Mount, camera, focus, guide (Ekos) controlled by Astroberry (KStars/Ekos Linux)
Exp. time : 181*30 seconds at ISO800
Image process tool : AstroImageJ, Fitswork
Processing : Flat calibrated, bias subtracted, cropped about 70%.
Site : Sweden, Stockholm, Hagsätra. Bortle 9
Free view Az: 20o-90o, 165o-185o, La: 20o-55o
Comment : This was the first astrophoto of this season. I didn't even had time to polar align or focus correct. Comet Leonard can be as bright as magnitude 4, when I took this photo the magnitude was maybe 5.5. I can very sad about where I live, Bortle class 9 ! We have just come home from Fuerteventura, Bortle class 3.
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