NGC 2855 - (R)SA(r)0/a

NGC 2855

De Vaucouleurs Atlas Type: (R)SA(r)0/a

Filter: B

Telescope: NOT 2.5-m
North up , East left
Field Dimensions: 5.3 x 3.9 arcminutes

RC3 Type: (R)SA(rs)0/a
RSA Type: Sa(r)
Surface Brightness Range Displayed: 17.9-27.0 mag per square arcsec
Absolute Blue Magnitude: -19.8

De Vaucouleurs Atlas Description:

Much of the structure of this galaxy is found at small radii. The (r) classification refers to a small, virtually closed feature that lies very close to the center. Morphologically, the ring very much resembles the inner ring seen in NGC 7217 , a feature which is defined in part by dust. The inner edge of the ring is sharp, and shows no near-side/far-side effects. Outside the ring, a series of dust lanes gives the impression of incipient spiral structure, which is the basis for the S0/a classification. These dust lanes do show a near-side/far-side asymmetry . The image in the Hubble Atlas showed mainly this region, but in our Atlas image, there is a large extended disk showing a partial outer ring . The ring is weak on one side, but is sufficiently evident to merit the (R) classification.