NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC4305
Basic Information
Location and Magnitude
Right Ascension: 12:22:3.6
Declination: +12:44:27
Constellation: VIR
Visual Magnitude: 12.6
Historic Information
Discoverer: Herschel J.
Year of discovery: 1829
Discovery aperture: 18.3
Observational
Summary description: vF, R
Sub-type: Sa
Corwin's Notes
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NGC 4305. The position given for this by Schwassmann in his list of Virgo
Cluster galaxies is about an arcmin off to the south of the true position.
Since Schwassmann was a pioneer in the measurement of accurate positions on
photographic plates, this -- and a few other buggy numbers in his list -- are
a bit of a puzzle. They most likely come from numerical errors in the
reduction of the measured rectangular coordinates to RA and Dec. In our
present age of electronic computers, we often forget that the calculations at
the turn of the century were all done by hand. Accidental errors were thus
more likely. My guess is that this is one, though it may, of course, come
from any number of sources including measuring error, simple transcription
error, and so on.
See also NGC 4443.
Steve's Notes
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NGC 4305
24" (5/29/14): moderately bright, moderately large, oval 5:3 SW-NE, 1.0'x0.6'. Contains a brighter, elongated core. Brighter of a pair with NGC 4306 2.8' N.
17.5" (4/25/87): fairly faint, fairly small, elongated SSW-NNE, diffuse arms, weak concentration. Forms a pair with NGC 4306 2.8' N. NGC 4267 lies 33' W.