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| Cygnus A |
| Observation data (J2000 epoch) |
| Constellation |
Cygnus |
| Right ascension |
19h 59m 28.3565s[1] |
| Declination |
+40° 44′ 02.099″[1] |
| Redshift |
0.056146 ± 0.000160 km/s[1] |
| Distance |
600 Mly |
| Type |
E[1] |
| Apparent dimensions (V) |
0.549' × 0.457'[1] |
| Apparent magnitude (V) |
16.22[1] |
| Other designations |
| 4C 40.40, 2E 4309, CYG A, W 57, BWE 1957+4035, NRAO 620, 1C 19.01, QSO B1957+405, 3C 405, 1RXS J195928.7+404405, 3C 405.0, 2U 1957+40, 3CR 405, LEDA 63932, 4U 1957+40, VV2000c J195928.3+404402, DA 500, MCG+07-41-003, DB 117, Mills 19+4, VV 72. [1] |
| See also: Galaxy, List of galaxies |
Cygnus A (3C 405.0) is one of the brightest and most famous radio galaxies. It was discovered by Grote Reber in 1939. In 1953 Roger Jennison and M K Das Gupta showed it to be a double source. It is thought to contain an active galactic nucleus. Cygnus A appears in Carl Sagan's Contact as the result of beings actively creating a galaxy.
[edit] References
- ^ a b c d e f g NASA/IPAC Extragalactic Database. Results for. Retrieved on 2006-11-04.
- Jennison, R. C.; Das Gupta, M. K., Fine structure of the extra-terrestrial radio source Cygnus 1., Nature, Vol. 172, pp. 996, 1953
- Harris, D. E.; Carilli, C. L.; Perley, R. A. X-Ray Emission from the Radio Hotspots of Cygnus-A , Nature Vol. 367, pp. 713, 1994
[edit] External links
