NGC/IC Project Restoration Effort

(This is a very very beta version)

NGC7640

 

Basic Information


Location and Magnitude


Right Ascension: 23:22:6.6
Declination: +40:50:42
Constellation: AND
Visual Magnitude: 11.3

Historic Information


Discoverer: Herschel W.
Year of discovery: 1784
Discovery aperture: 18.7

Observational


Summary description: cF, L, mE 164°, vlbM, r
Sub-type: SBc

Steve's Notes

===== NGC 7640 24" (10/4/13): at 200x appeared bright, very large, nearly edge-on 4:1 N-S, ~6.5'x1.5'. Very asymmetric appearance with a brighter, elongated core, 1.0'x0.5', which is oddly angled to the major axis in PA 20¡ (SSW-NNE). A mag 14 star is just off the SE side of the core. The galaxy dims more noticeably on the south side, but is brighter along the western half (DSS shows this is a long spiral arm). A mag 11 star is just west of the northern end of the galaxy [3.1' NNW of center] and two mag 14.5-15 stars that are collinear with the mag 11 star are superimposed on the north side. The northern half of the galaxy is also asymmetric with a slightly brighter strip (arm) extending N-S and a very low surface brightness (outer arm) near the mag 11 star. Additional mag 11 stars bracket the galaxy just west of the south end and 1.8' NE of center. 17.5" (8/8/91): moderately bright, very large, very elongated 4:1 N-S, 7.0'x1.5'. The large, slightly brighter middle bulges out a little. A mag 13.5 star is at the SE edge of the core 33" from the center. Bracketed by two mag 11 stars at the north end 3.0' NNW of center and just west of the south end 2.6' SSW of center. An extremely faint mag 15 star is embedded near the north end. 8" (11/8/80): faint, large, very elongated streak N-S. There are stars at both the north and south end.