NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC5509
Basic Information
Location and Magnitude
Right Ascension: 14:12:39.9
Declination: +20:23:18
Constellation: BOO
Visual Magnitude: 14.1
Historic Information
Discoverer: Bigourdan
Year of discovery: 1887
Discovery aperture: 12.4
Observational
Summary description: vF, S, R, stellar Nucl
Sub-type: S0
Corwin's Notes
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NGC 5509 = CGCG 133-010. Bigourdan's declination, as published in his first
list of new nebulae in Comptes Rendus, is 16.3 arcmin off the position derived
from his micrometric offsets. This may be a simple mistake, or it could be
the result of confusion over his comparison star. He lists it twice (once for
each of the nights he observed N5509), but at different magnitudes (8.5 and
11.5) and declination offsets from BD +21 2625 (-19 arcmin and -17.2 arcmin).
GSC has m = 11.6 from two measurements with the offset being -18 arcmin.
Whatever the cause of the error, the correct identity is clear when the
reductions are redone using the modern position for the comparison star.
Steve's Notes
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NGC 5509
17.5" (7/17/01): faint, fairly small, round, 0.7' diameter. Weak, even concentration and no well-defined core. Occasionally, a faint stellar nucleus was glimpsed. Located 7' WSW of NGC 5513/MCG +04-34-004 and first of trio. This identification differs from the RNGC and PGC and this galaxy is not identified as NGC 5509 in CGCG, MCG or PGC.