Time: 21:15UT 2021-02-11 Exp.17 x 7 min.
Telescope 0.254m f/6.34 with ST-10XME CCD Binning 2x2 1.51"/pix
Odd Trondal Obs.code 238 Oslo Norway

(Plutonium Isotope (Atom-weight 238). Half-life 87.7 years gives power to the Voyagers and other distant spacecrafts.)