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Details:
Time: 23:11UT 2021-02-26 Exp.37 x 62sec .Mag.Approx.17.0
Tel: C14 @ f/8.2 AP7 CCD 1.78"/pix Paramount GT-1100S
Odd Trondal Obs.code 238 (Uranium). Oslo Norway.
Time: 18:50UT 2021-02-09 Exp.9 x 242sec .Mag.Approx.17.5
Telescope 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.
AT2021dpu (= ZTF21aamnngb) discovered 2021/02/22.140 at R.A. =
02h48m16s.118, Decl. = +50°47'56".04 Mag 19.5:2/22, Type unknown (zhost=0.016355)
(host UGC 2261) (References: TNS, ZTF observations)
AT2021cah (= ZTF21aahgspm) discovered 2021/02/07.141 at R.A. =
02h48m30s.727, Decl. = +50°45'36".04 Mag 18.6:2/7, Type SN II
(zhost=0.016491) (host UGC 2270) (References: TNS, ZTF observations)
Reference: David Bishop http://www.rochesterastronomy.org/snimages/
Discovery page (References: TNS):
https://wis-tns.weizmann.ac.il/object/2021dpu
https://wis-tns.weizmann.ac.il/object/2021cah
Reference image from Aladin or Sloan Digital Sky Survey
Software used:TheSky6,CCDSoft 5, MSB Astroart 2.0,7.0, Paint
Odd Trondal on February 9, 2021 @ Oslo
Photographer's website:
https://www.flickr.com/photos/odd_trondal/
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