NGC/IC Project Restoration Effort

(This is a very very beta version)

NGC3992

 

Basic Information


Location and Magnitude


Right Ascension: 11:57:35.4
Declination: +53:22:25
Constellation: UMA
Visual Magnitude: 9.8

Historic Information


Discoverer: Mechain
Year of discovery: 1781
Discovery aperture: 3.0

Observational


Summary description: cB, vL, pmE, sbMBrN
Sub-type: SBbc

Steve's Notes

===== NGC 3992 18" (5/14/07): bright, large, elongated 3:2 or 5:3 SW-NE, ~6.5'x4'. The galaxy lies between a mag 9.5 star 5' SW and a mag 12 star 3.4' NE of center, just beyond the edge of the halo. The galaxy is sharply concentrated with a fainter halo and a bright, oval core that increases slightly to a faint stellar nucleus. With averted vision, the halo is quite extensive and reaches to the mag 12 star to the northeast. The halo appears mottled or dusty with an impression of spiral structure. A mag 12.5 star is superimposed less than 1' N of the center and another mag 12 star is near the SW end. 17.5" (3/19/88): bright, large, elongated 5:3 SW-NE, at least 6.0'x3.5', broadly concentrated halo, large faint halo. A mag 13 star is superimposed on the halo 50" NNW of center. A mag 13 star is at the NE edge of the halo 3.4' from center. Located 5.1' NE of mag 9.3 SAO 28199 and 39' SE of mag 2.4 Gamma UMa. Forms a pair with UGC 6923 15' SSW. 13" (3/24/84): fairly bright, large, elongated SW-NE, bright core, diffuse halo. A star is superimposed NW of the core.