400/500mm - 17.5" (1/9/99): the combined glow of interconnected HCG 18B, C and D was glimpsed for moments as an extremely low surface brightness, elongated haze. The glow appeared larger than HCG 18A just 1.5' SE, but I couldn't hold both objects simultaneously.

900/1200mm - 48" (10/26/16): UGC 2140 consists of the connected glow of HCG 18B, 18C and 18D. Although Hickson assumed these were three interacting or merging galaxies, a recent study suggests this is a single highly irregular galaxy with several knots. HCG 18D is the northwest component of the UGC 2140 chain and contains a fairly faint, very small knot, 6"-8". This knot is embedded in a low surface brightness glow extending to the southeast and containing 18C and 18B. Very faint haze bulges out just east of HCG 18B. HCG 18C is the central component of UGC 2140. Its nucleus appeared faint, very small, ~9"x6" and is surrounded by low surface extensions to the northwest and southeast, merging into HCG 18B on the southeast end. HCG 18B is fairly faint, very elongated 3:1 or 4:1 NNW-SSE, perhaps 45"x12". This portion of UGC 2140 is a similar to size as HCG 18A but has a fairly uniform surface brightness. A mag 15.5-16 star lies 0.6' E.