Observation: 2019-12-21. Location: Cherry Springs (elevation 700 m). Sky: 21.42 mag/arcsec2 in zenith, seeing 1-2 arcsec. Telescope: D = 508 mm, F/4 Newtonian. Ocular: 5.5 mm wide-field (360x).
Object: Arp 54, MCG-1-7-7 and PGC 9107, Cetus. Arp catalog category: "Spiral, high-SB companion on arms."
Sketch: North up, field 3 arcmin. Pencil, tortillon, white paper. Finished at the telescope. Sketch photographed and inverted black-to-white digitally.