NGC/IC Project Restoration Effort

(This is a very very beta version)



Basic Information

Location and Magnitude

Right Ascension: 1:16:12.4
Declination: +33:3:49
Constellation: PSC
Visual Magnitude: 14.0

Historic Information

Discoverer: Stephan
Year of discovery: 1881
Discovery aperture: 31.0


Summary description: vF, vS, R, vlbM
Sub-type: Sc

Corwin's Notes

===== NGC 451 = IC 1661, and is another of Barnard's IC discoveries sent directly to Dreyer (Stephan discovered the object, and his observation led to the NGC entry). It is also the second of two nebulae which Barnard found in the area. Like the first (NGC 447, which see), there is possible confusion about its identification. In this case, Barnard's description is sparce, "eF, S, R" and his position has the RA of NGC 451, but is closer in declination to NGC 449. Two things convince me that Barnard reobserved NGC 451 (which is just where Stephan measured it to be): 1) this galaxy is brighter than N449 by at least a magnitude, and it is larger, too. 2) Barnard's declination is about 1.2 arcmin north of the true place of NGC 451, just as his declination of N447 is about 1.4 arcmin north of that galaxy. If he observed both objects on the same night, as seems likely, then the offset will be systematic. Since we know the identification of N447 = I1656 is solid, it follows that N451 must be I1661.

Steve's Notes

===== NGC 451 17.5" (9/19/87): very faint, very small, oval. Located 3.3' SSW of mag 6.0 SAO 54567! Forms a close pair with NGC 449 1.9' NW.