900/1200mm - 48" (10/29/16): at 488x; the Ring galaxy Arp 10 is unusually sharply concentrated with a blazing core that's offset to the southeast side. A brighter arc is at the northwest end of the halo (ring segment). A very weak enhancement at the southeast end blends into the glow on the southeast end of the galaxy. LEDA 3635229, initially presumed to be the collider, is a background galaxy at a light-travel time of 1.175 billion years, lies 1.1' NE. It appeared faint, very small, elongated 3:2 N-S, ~15"x10".

48" (10/23/11): this collisional ring galaxy was viewed at 488x. It appeared sharply concentrated with a very bright, round core 0.3' diameter. The core is offset to the SE side of a much fainter and the halo is slightly elongated NW-SE, 0.9'x0.7'. A 90? bright arc (part of the ring!) was easily visible on the northwest edge of the halo. A 1993 study in AJ, 414, 154 by Charmandaris, Appleton and Marston showed this arc consists of a number of HII knots and strong star formation. A mag 14.8 star lies 1.3' W and a mag 13.5 star is 2' SW.