NGC/IC Project Restoration Effort

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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

===== 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 ...