Supernova in galaxy PGC 21100
Taken by Odd Trondal on October 16, 2021 @ Arneberg Norway
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Time: 03:17UT 2021-10-16 Exp.7 x 182sec
Tel: 0.18m Maksutov @ f/6.9 ST-402ME 1.5"/pix EQ8 mount
Frank Faldmo, Tom V. Arnesen, Bård Nordhagen, Odd Trondal at Arneberg Observatory Norway.

2021yok (= ATLAS21bika) discovered 2021/09/10.577 at R.A. = 07h28m55s.480, Decl. = +20°35'09".89 Mag 17.4:9/10, Type II (z=0.015) (host UGC 3873) (References: AstroNote 2021-238, TNS)

Reference David Bishop http://www.rochesterastronomy.org/snimages/

Discovery page (References: TNS):
https://www.wis-tns.org/object/2021yok

Reference image from Aladin or Sloan Digital Sky Survey

Software used:TheSky6,CCDSoft 5, MSB Astroart 2.0,7.0, Paint
Photographer's website:
https://www.flickr.com/photos/odd_trondal/
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