NGC/IC Project Restoration Effort

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NGC3793

 

Basic Information


Location and Magnitude


Right Ascension: 11:40:2.0
Declination: +31:52:41
Constellation: UMA
Visual Magnitude: 13.7

Historic Information


Discoverer: Tempel
Year of discovery: 1882
Discovery aperture: 11.0

Observational


Summary description: vS, f h 932
Sub-type: *

Corwin's Notes

===== NGC 3793 and NGC 3797 are most probably stars. Tempel has this to say about them in his paper in AN 2439 (1882): "For the fine double nebula [GC] 2479-80 = h. 331-32 [should be 'h. 931-32' = N3786,8], I have one hasty sketch from 12 Febr. '82, which shows two very small nebulae +18 sec and +30 sec following the southern component [of the double nebula], which I cannot find catalogued." (He goes on to describe his observations of NGC 3786 and 3788.) There are two 15th magnitude stars at the appropriate offsets in RA, just a minute or two south of the declination of the brighter galaxies. For the NGC, Dreyer placed Tempel's two novae following the northern component, NGC 3788. This makes the RA's of the novae too large by 2-3 seconds, and displaces the positions well off the stars. This has misled RNGC to assign NGC 3793 to the much fainter galaxy VV 575 = CGCG 157-007 south- preceding NGC 3786,8. When the correct reference galaxy is used, the RA's come to within a second or two of the stars. Thus, these are almost certainly the objects that Tempel saw.