NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC4509
Basic Information
Location and Magnitude
Right Ascension: 12:33:6.8
Declination: +32:5:32
Constellation: CVN
Visual Magnitude: 13.5
Historic Information
Discoverer: Herschel J.
Year of discovery: 1828
Discovery aperture: 18.3
Observational
Summary description: vF, S, R, lbM
Sub-type: Sab/P
Corwin's Notes
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NGC 4509. JH's position is just one minute of time too small. As far as I
can determine, this was first noted by Bigourdan who wrote, "This nebula, far
removed from the GC position ..." His measured position is correct. Reinmuth
flagged the corrected position, and Seyfert (yes, the same Seyfert) noted it
in his paper in HA 105, 219, 1937. This is where it was picked up later by
RC1. MCG and UGC have the correct position with no comment about the source
of the correction.
The galaxy itself is an odd little irregular galaxy with no trace of a
nucleus, but with many patches and knots over its face. The position I've
chosen is from GSC-A; it seems to represent the object as well as possible
given the lack of structure.
Steve's Notes
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NGC 4509
17.5": faint, small, slightly elongated SW-NE, almost even surface brightness. Located 4.5' NW of a bright double star ·1653 = 8.7/9.2 at 8".