NGC 4636 (UGC 7878, PGC 42734 and others) is a large (approximately 105,000 light-years in diameter) elliptical galaxy located approximately 49 million light-years away in Virgo.
On January 12th, 2020, Koichi Itagaki discovered a magnitude 15 supernova designated as SN 2020ue (https://wis-tns.weizmann.ac.il/object/2020ue). This one has brightened to around magnitude 12.1. The supernova is the bright, out of place blue star at about 5 o’clock under NGC 4636.
2MASX J12424244+0247035 (PGC 1237353 and others) is the largest galaxy above NGC 4636. It is the brightest member of Abell 1599.
Luminance – 31x600s – 310 minutes – binned 1x1
RGB – 8:8:9x300s – 40:40:45 minutes each – binned 2x2
435 minutes total exposure – 7 hours 15 minutes
Imaged over six nights in January, 2020 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.
LRGB - https://www.flickr.com/photos/dcrowson/49483610087/sizes/l/