The information provided in the lists of galaxies
The galaxies have been selected from the Third Reference Catalogue of Bright Galaxies (RC3) (de Vaucouleurs et al 1991)
The following quantities are either taken directly from this catalogue or derived from it. Derived quantities are indicated by asterisks.
|
QUANTITY |
WHAT IT MEANS |
UNIT |
|
no |
no in the original RC3 catalogue |
|
|
PGC |
no in the Principal Galaxy Catalogue (PGC) |
|
|
name |
other names |
|
|
bar |
whether listed as barred (spirals and lenticulars) |
|
|
class |
Hubble class (e.g. spiral, elliptical, irregular) |
|
|
* stage |
Hubble symbol (e.g. Sb, E5, Irr) |
|
|
* B_mean |
magnitude in B waveband (blue) |
mag |
|
* major |
major axis (at 25 mag arcsec^-2 surface brightness) |
arcmin |
|
* ratio |
ratio of major to minor axis |
|
|
* n |
index n in "En" classification of ellipticals |
|
|
* viewing |
viewing angle (spirals and lenticulars only) |
deg |
|
* aspect |
whether nearly face-on or edge-on |
|
|
inner |
whether inner ring mentioned |
|
|
outer |
whether outer ring mentioned |
|
|
T |
Hubble stage T (a numerical equilavlent to Hubble symbol |
|
|
B-VT |
colour B-V |
mag |
|
U-BT |
colour U-B |
mag |
|
VGSR |
recession velocity (relative to Milky Way) |
km/s |
|
_RAJ2000 |
RA (as decimal) |
deg |
|
_DEJ2000 |
Dec (as decimal) |
deg |
|
RA2000 |
RA (hr min sec) |
h:m:s |
|
DE2000 |
Dec (deg min sec) |
d:m:s |