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Details:
Time: 22:57UT 2021-05-20 Exp.32 x 1min
Tel: 0.254m f/6.34 with ST-10XME CCD Binning 2x2 1.51"/pix
Odd Trondal Obs.code 238 (Uranium). Oslo Norway.
Plutonium Isotope.Atom-weight 238.Half-life 87.7 years gives power to the Voyagers, New Horizon and other distant spacecrafts.
AT2021mdk (= ATLAS21oof) discovered 2021/05/12.388 at R.A. =
17h15m30s.969, Decl. = +39°11'06".45 Mag 19.0:5/12, Type SN II
(host CGCG 225-085) (References: TNS)
Reference: David Bishop http://www.rochesterastronomy.org/snimages/
Discovery page (References: TNS):
https://wis-tns.weizmann.ac.il/object/2021mdk
Reference image from Aladin or Sloan Digital Sky Survey
Software used:TheSky6,CCDSoft 5, MSB Astroart 2.0,7.0, Pai
Photographer's website:
https://www.flickr.com/photos/odd_trondal/
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