600/800mm - 24" (7/2/19): at 375x; UGC 10641, located 4.5' SW of NGC 6286 (southeastern member of Arp 293, with NGC 6285), is an extremely low surface brightness superthin. It only "popped" a few times but confirmed and was no more than a ghostly sliver 15"x6" E-W.

24" (7/20/17): at 375x; this 16th magnitude superthin was only glimpsed due to its extremely low surface brightness. Only the central region, extending 15"x5" E-W, was seen with confidence. Situated 0.4' NW of a mag 13.7 star and 4.5' SW of the interacting pair (Arp 293) NGC 6285/6286.

24" (6/28/16): extremely faint and thin edge-on 8:1 E-W, unusually low even surface brightness, ~40"x5". A mag 13.7 star is 0.4' SE of center. Based on the DSS image I was surprised to pick up this superthin with certainty 4.5' SW of NGC 6285/6286 (interacting pair Arp 293). The SQM-L reading at the time was over 21.8.