De Vaucouleurs Atlas Type: SAB(rs)d

Filter: B

Telescope: McGraw-Hill 1.3-m
North up , East left
Field Dimensions: 5.3 x 4.0 arcminutes

RC3 Type: SAB(rs)d
RSA Type: SBc(r)II
Surface Brightness Range Displayed: 20.5-26.0 mag per square arcsec
Absolute Blue Magnitude: -20.1
Elmegreen Spiral Arm Class: AC 4

De Vaucouleurs Atlas Description:

NGC 4145 has a very good patchy, late-type bar. The inner pseudoring is made from two well-defined spiral arms and is exceptionally good for such a late-type . It is of the bracket (NGC 4548 ) type. The disk and outer arms are very extensive compared to the size of the inner pseudoring and bar.