Time: 20:39UT 2023-10-20 Exp.16 x 65sec
Tel: C14 @ f/7.90 AP7 CCD 1.78"/pix Paramount GT-1100S (Tenagra North)
Odd Trondal Obs.code 238 (Uranium). Oslo Norway.

Atom weight Neptunium Isotope 238.Half-life 2 days
Plutonium Isotope.Atom-weight 238.Half-life 87.7 years gives power to the Voyagers, New Horizon and other distant spacecrafts.

AT2023uri (= PSP23K) (= PNV J00430061+4119400) (= M31N 2023-10d), TNS discovered 2023/10/11.592 by Xingming Observatory Sky Survey (XOSS) Found in M31 at R.A. = 00h43m00s.610, Decl. = +41°19'40".00 Located 183".5 east and 211".5 north of the center of M31 (Hornoch Discovery image) Mag 15.1:10/14, Type EGN (References: AstroNote 2023-271, ATEL 16285, ATEL 16290, ATEL 16291, ATEL 16293, CBAT TOCP)