NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC4443
Basic Information
Location and Magnitude
Right Ascension: 12:29:2.9
Declination: +13:11:4
Constellation: VIR
Visual Magnitude: 11.2
Historic Information
Discoverer: Stoney J.
Year of discovery: 1849
Discovery aperture: 72.0
Observational
Summary description: F, S, κ in Ld R's diagram
Sub-type: SB0-a
Corwin's Notes
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NGC 4443 has usually been taken as a star following NGC 4435 and NGC 4438.
Exactly which star, I'm not sure as there is nothing at the NGC position aside
from a 19th or 20th magnitude object.
In any event, the only evidence we have for this object comes from one
observation in 1849 when LdR's observer, Johnstone Stoney, sketched it as the
last of 11 nebulae. The sketch is fairly crude and the distances between the
objects do not correspond well to what we see on the sky. Indeed, LdR himself
says, "Found the objects as in sketch, positions being put down very rudely."
Nevertheless, we -- and Dreyer who identified the objects for LdR's 1880
monograph -- can recognize the brightest galaxies in an east-west swath of sky
through the center of the Virgo Cluster. His objects are as follows (in his
order):
alpha = NGC 4305
beta = NGC 4306
gamma = NGC 4374
delta = NGC 4387
epsilon = NGC 4388
zeta = NGC 4406
eta = NGC 4402
lambda = NGC 4425
theta = NGC 4435
iota = NGC 4438
kappa = NGC 4443
As I noted above, there is nothing in the exact position of LdR's "kappa", but
NGC 4461 is not too far away. It is certainly not a big stretch to get to
this galaxy, and its description is a relative fit to the others.
The objection to this is that only one galaxy is shown in the sketch, whereas
there are, of course, two on the sky: NGC 4458 is not too far northwest of
N4461. Given the hurried nature of the observations, though, it may be that
Stoney thought N4458 to be a star. It is considerably smaller and fainter
than its companion, so this is a possibility.
So, I'm going to take N4443 to be a duplicate discovery of N4461, but with
some uncertainty.
Steve's Notes
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NGC 4443
See observing notes for NGC 4461. NGC identification very uncertain.