HCG 21
right ascension (1950) |
02 43 00.37 |
|
declination (1950) |
-17 50 12.7 |
|
galactic longitude (deg) |
199.03 |
|
galactic latitude (deg) |
-62.09 |
|
mean redshift |
0.0251 |
|
total blue magnitude |
12.65 |
|
number of galaxies |
5 |
|
number of accordant galaxies |
3 |
|
median galaxy separation (kpc) |
134.9 |
|
radial velocity dispersion (km/s) |
112.2 |
|
crossing time/Hubble time |
0.0933 |
|
mass-to-light ratio (solar units) |
63.1 |
|
image size |
15 arcmin |