De Vaucouleurs Atlas Type: SA(s)d
Telescope: Danish 1.54-m
North up , East left
Field Dimensions: 13.6 x 12.6 arcminutes
RC3 Type: SA(s)dm
RSA Type: Scd(s) III
Surface Brightness Range Displayed: 19.0-27.0 mag per square arcsec
Absolute Blue Magnitude: -17.8
Elmegreen Spiral Arm Class: AC 1
De Vaucouleurs Atlas Description:
NGC 45 is a very late-type spiral, a member of the nearby Sculptor Group (de Vaucouleurs 1959b). There is no clear bulge or nucleus, but the spiral structure is well-defined and reasonably symmetric, and we adopt the Sd type.
The inner regions are perhaps ambiguous about the presence of a bar. The bright diffuse center is flanked on opposite sides by diffuse parts of spiral arms.