NGC/IC Project Restoration Effort
(This is a very very beta version)
Location and Magnitude
Right Ascension: 13:39:57.8
Visual Magnitude: 12.3
Discoverer: Herschel W.
Year of discovery: 1793
Discovery aperture: 18.7
Summary description: F, S, iR, f of D neb
48" (5/4/16): at 610x; bright, fairly large, two-armed spiral that is interacting with NGC 5257. The main body is elongated 3:1 SSW-NNE, 1.1'x0.35', and is well concentrated with a fairly small, roundish, brighter core. A mag 15.5 star is at the NNW edge and an apparent HII region is visible midway between the core and this star, along the major axis. A strong spiral arm is easy visible attached to the southwest end. It hooks sharply to the east and gradually fades, stretching 40"-45" E. A dim shorter arm is attached on the northeast end and curls west near the mag 15.5 star, extending perhaps 20" in the direction of NGC 5257.
17.5" (4/28/90): fairly faint, fairly small, elongated 5:2 SSW-NNE, brighter along the major axis. Located 4.2' NW of mag 9.5 SAO 120058. NGC 5258 has a slightly higher surface brightness than its close companion NGC 5257, just 1.5' WNW.