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 2 3 "NASA/IPAC Extragalactic Database". Results for QSO B1637+826. Retrieved 2006-10-26.
- ↑ 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:
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