3C 20

3C 20
Observation data (Epoch J2000)
Constellation Cassiopeia
Right ascension 00h 43m 08.84s[1]
Declination +52° 03′ 33.8″[1]
Redshift 0.174
Distance ~ 700 Mpc
Type E[1]
Apparent dimensions (V) 76.8 × 76.8 arcsec²[2] (radiogalaxy)
Apparent magnitude (V) 19[3]
Other designations
DA 22 , LEDA 2817481 , 3C 20
See also: Quasar, List of quasars

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. 1 2 3 "NASA/IPAC Extragalactic Database". Results for QSO B1637+826. Retrieved 2006-10-26.
  2. ↑ www.jb.man.ac.uk/atlas/
  3. ↑ Simbad
  4. ↑ 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

  1. ↑ Calculated from apparent size and distance:

Coordinates: 00h 43m 09.21s, +52° 03′ 33.5″

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