NGC/IC Project Restoration Effort
(This is a very very beta version)
NGC2495
Basic Information
Location and Magnitude
Right Ascension: 8:0:33.2
Declination: +39:50:26
Constellation: LYN
Visual Magnitude: 15.2
Historic Information
Discoverer: Mitchell
Year of discovery: 1855
Discovery aperture: 72.0
Observational
Summary description: Follows III 750 2' or 3', eF, vS
Sub-type: Sd
Corwin's Notes
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NGC 2495. There is a chance that we have misidentified this galaxy. LdR's
observations of this and NGC 2493 may refer to other objects as some of his
remarks are mystifying if these are the two objects he was indeed looking at.
For NGC 2493, he says (twice, on 12 Jan 1855 and 14 Feb 1855), "A F * p", but
the nearest stars are north-northwest and south-southwest, in other words,
more north and south than preceding. Similarly, for NGC 2495, he says (on 14
Feb 1855), "a nebs knot follows 2' or 3' dist." But on 5 March 1867, he has
"neb nf is eF, difficult, Pos 54[deg] (2), Dist 12 [arcsec] (2)." Dreyer
noted the problem in the 1880 monograph, saying, "The estimated dist in the
obs from 1855 is very different; was a different object seen? or should the
Dist 12[arcsec] be increased by 65[arcsec] = 1[superscript 'r']?" Since the
actual distance is 115 arcsec, it seems likely that the distance should have
been recorded as 122 arcsec (two rotations of the micrometer screw plus the
additional 12 arcsec). But even this change would still not explain the
position angle which is 74 degrees, not 54 degrees.
So, there is a minor mystery here.
Finally, to add to the intrigue, the fainter galaxy is also Markarian 383 and
KUG 0757+399, picked out in both surveys for its excess ultraviolet continuum.
But the position given in the KUG list is for a star about 25 arcsec east of
the galaxy.
Steve's Notes
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NGC 2495
17.5" (2/24/90): extremely faint and small, round. A mag 14.5 is off the east edge 24" from center. Forms a pair with much brighter NGC 2493 1.8' WSW.