UGC 4580 NGC 3010A
Uma
☀14.6mag
Ø 96'' / 84''

This low luminosity dwarf irregular is a member of the M81 group. It is resolved on the SDSS into a large number of blue HII knots, with the brightest complex on the north edge.

600/800mm - 24" (2/16/15): at 200x; very faint, moderately large, roundish. Appears as a very low surface brightness ill-defined patch with no structure, perhaps 45"-60" diameter.

Notes by Steve Gottlieb