NGC 6951 - SAB(rs)bc

NGC 6951

De Vaucouleurs Atlas Type: SAB(rs)bc

Filter: g

Telescope: Pal 1.5-m
North right , East up
Field Dimensions: 5.2 x 3.9 arcminutes

RC3 Type: SAB(rs)bc
RSA Type: Sb/SBb(sr)I.3
Surface Brightness Range Displayed: 18.5-27.0 mag per square arcsec
Absolute Blue Magnitude: -21.2
Elmegreen Spiral Arm Class: AC12

De Vaucouleurs Atlas Description:

NGC 6951 is a typical example of its type. The inner pseudoring is of the wrapped arm type, but is not conspicuous. The outer arms are complex and slightly asymmetric. At least three clear spiral arms can be followed in the outer disk. In the bar region, strong and very linear leading dust lanes are present. A B-V color index map reveals that these dust lanes wrap around a small star-forming nuclear ring. This nuclear ring is visible in the blue light image, but a much higher resolution image is provided by Barth et al. (1995). The map also shows considerable star formation in the outer arms. The openness and patchiness of the outer arms favors the Sbc classification. The bar is conspicuous but is weak-looking enough to merit the classification SAB.