NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC3494
Basic Information
Location and Magnitude
Right Ascension: 11:1:10.9
Declination: +3:46:28
Constellation: LEO
Visual Magnitude:
Historic Information
Discoverer: Tempel
Year of discovery: 1882
Discovery aperture: 11.0
Observational
Summary description: vS, h 809 6' s
Sub-type: *2
Corwin's Notes
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NGC 3494 is may be the double star 8-9 arcmin north of NGC 3495. Tempel says
only (in a very crude translation by yrs trly), "Six arcminutes north of the
middle knot [of three in N3495], I repeatedly saw a very small nebula, which
at first sight I took to be [part of] N3495." There is nothing in the
implied position (calculated by Dreyer from N3495's position), but the double
is only 3 arcmin further north, and is of similar brightness to other stars
that Tempel mistook for nebulae.
Jeffrey Corder wrote in January 2009, however, suggesting that one of the
knots in NGC 3495 itself may be NGC 3494. I've looked at the field using the
DSS and am skeptical. Aside from its nucleus, the brightest knots in N3495
are to the south, and only an arcminute away from the nucleus. Jeff, of
course, has the advantage of having actually seen the galaxy and its field.
But Tempel was an experienced observer, too. I can accept easily that he
might have made one mistake in his description, but two begins to stretch
credibility.
However, I've marked the double star with a colon. I'm clearly not sure about
the identification, but don't see a better alternative closer to the galaxy,
either. So, maybe ...