Dwingeloo 1 - SB(s)cd

Dwingeloo 1

De Vaucouleurs Atlas Type: SB(s)cd

Filter: I (stars)

Telescope: KPNO 0.6/0.9-m
North up , East left
Field Dimensions: 14.2 x 10.6 arcminutes

RC3 Type: -----
RSA Type: -----
Surface Brightness Range Displayed: 18.0-27.0 mag per square arcsec
Absolute Blue Magnitude: -18.8

De Vaucouleurs Atlas Description:

Dwingeloo 1 was the first major nearby galaxy discovered through the detection of its 21-cm HI emission, rather than an image in visible light (Kraan-Korteweg et al. 1994; Huchtmeier et al. 1995). The images shown here are from Buta and McCall (1999), who classified the galaxy as SB(s)cd because it has almost no bulge. The image at right has been cleaned of all foreground stars, which helps to reveal the faint background disk the main arms are embedded within. Based on the surface photometry of Buta and McCall (1999), Dwingeloo 1 is the fourth brightest member of the IC 342 /Maffei Group. Buta and McCall also detected a dwarf elliptical companion to Dwingeloo 1 (McCall and Buta 1997).