NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC5491
Basic Information
Location and Magnitude
Right Ascension: 14:10:57.4
Declination: +6:21:54
Constellation: VIR
Visual Magnitude: 12.9
Historic Information
Discoverer: Herschel W.
Year of discovery: 1793
Discovery aperture: 18.7
Observational
Summary description: pB, pS, R, gbM, r
Sub-type: Sb
Steve's Notes
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NGC 5491
24" (6/15/15): moderately bright, fairly small elongated 4:3 WSW-ENE, 40"x30", contains a small bright core. Forms a close pair with NGC 5491B at the north edge of the halo, just 25" from the center. At 375x (6mm ZAO) this compact companion appeared very faint, nearly stellar, visible ~1/3 of the time. A mag 14.8 star is 0.9' NE and a second mag 15 star (misclassified by Holmberg as 597c) is 1.0' SW. Double star BRT 2158 = 12.5/12.7 at 4.5" lies 2.7' NE.
17.5" (5/10/91): fairly faint, fairly small, oval 3:2 WSW-ENE, elongated bright core. Bracketed between two mag 15 stars 30" off the ENE edge and 1' WSW. Forms an interacting pair with NGC 5491B at the north edge of halo (not seen).