NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC3109
Basic Information
Location and Magnitude
Right Ascension: 10:3:6.6
Declination: -26:9:30
Constellation: HYA
Visual Magnitude: 9.9
Historic Information
Discoverer: Herschel J.
Year of discovery: 1835
Discovery aperture: 18.3
Observational
Summary description: cF, vL, vmE 82°, lbM
Sub-type: SBm
Corwin's Notes
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NGC 3109. This large, nearby galaxy, just beyond the Local Group, was found
by JH in March of 1835. He took its position to be that of a superposed star
near the center of the brightest part of the galaxy. However, the bar is to
the east of the apparent center, and the approximate center of the bar is the
position I've taken to represent the galaxy.
Steve's Notes
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NGC 3109
48" (5/4/16): fairly bright, very large, very elongated 6:1 E-W, ~15'x2.5'. Contains a large brighter irregular core region but no nucleus. A mag 12.5 star is superimposed near the center and a number of fainter stars are superimposed. Overall the surface brightness is fairly low but patchy with several very small knots.
Near the southwest edge of the galaxy, 3.9' WSW of the mag 12.5 star, is a faint 12" knot, identified in SIMBAD as [BCP93] F3 H2 from the 1993 paper "The dwarf galaxy NGC 3109. I - The data". A faint 10" knot, listed as [BCP93] F1 H3, is 1.1' NW of the same star and another quasi-stellar knot (perhaps a faint star) is close northwest of the star. Finally, on the southeast flank of the galaxy is a faint larger patch, perhaps 15"-20", catalogued as [BCP93] F5 H1.
17.5" (2/28/87): fairly faint, very large, very elongated 4:1 E-W, diffuse. Appears as a low surface brightness streak with very weak concentration.