Astronomy:3C 20
From HandWiki
Short description: Radio galaxy in the constellation Cassiopeia
| 3C 20 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Cassiopeia |
| Right ascension | 00h 43m 08.84s[1] |
| Declination | +52° 03′ 33.8″[1] |
| Redshift | 0.174 |
| Distance | ~ 700 Mpc |
| Apparent magnitude (V) | 19[2] |
| Characteristics | |
| Type | E[1] |
| Apparent size (V) | 76.8 × 76.8 arcsec²[3] (radiogalaxy) |
| Other designations | |
| DA 22, LEDA 2817481, 3C 20 | |
3C 20 is a radio galaxy[4] located in the constellation Cassiopeia. It is one of largest known galaxies with a diameter of 850,000 ly (260 kpc).[lower-alpha 1]
References
- ↑ 1.0 1.1 1.2 "NASA/IPAC Extragalactic Database". Results for QSO B1637+826. http://nedwww.ipac.caltech.edu/.
- ↑ Simbad
- ↑ www.jb.man.ac.uk/atlas/
- ↑ Hiltner, P. R.; Meisenheimer, K.; Roeser, H. J.; Laing, R. A.; Perley, R. A. (1994). "Hot SPOT 3C20 west: an optical synchrotron source". Astronomy and Astrophysics 286: 25–36. Bibcode: 1994A&A...286...25H.
Notes
- ↑ Calculated from apparent size and distance:[math]\displaystyle{ 700 Mpc*sin(76.8 arcsec) = 850,000 ly }[/math]
Coordinates: 
00h 43m 09.21s, +52° 03′ 33.5″
 |  |
