Astronomy:3C 20
From HandWiki
| 3C 20 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Cassiopeia |
| Right ascension | 00h 43m 09.18s[1][2] |
| Declination | +52° 03′ 36.15″[1][2] |
| Redshift | 0.174±0.001[3] |
| Helio radial velocity | 52,164±300 km/s[3] |
| Galactocentric velocity | 52,352±300 km/s[3] |
| Distance | 2,501 ± 175.5 Mly (766.7 ± 53.8 Mpc)h−10.6774 (Comoving)[3] 2.213 Gly (678.5 Mpc)h−10.6774 (Light-travel)[3] |
| Apparent magnitude (V) | 19.0[3] |
| Apparent magnitude (B) | 19.0[2] |
| Characteristics | |
| Type | NLRG[3] |
| Apparent size (V) | 76.8″ × 76.8″²[4] (radiogalaxy) |
| Other designations | |
| DA 22, 3C 20 | |
3C 20 is a radio galaxy[5] located in the constellation Cassiopeia. It features a prominent double hotspot in its eastern lobe. An unusually low fraction of the flux lies within the radio core, which is suggested to be caused by a combination of factors, including jet orientation, synchrotron self-absorption and aging, as well as interactions with surrounding gas and dust.[6]
References
- ↑ 1.0 1.1 Chambers, K. C. (2017). "VizieR Online Data Catalog: The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)". Vizier Online Data Catalog. Bibcode: 2017yCat.2349....0C.
- ↑ 2.0 2.1 2.2 3C 20
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Template:NED link
- ↑ 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.
- ↑ Hardcastle, M. J.; Alexander, P.; Pooley, G. G.; Riley, J. M. (1997-07-11). "High-resolution observations at 3.6 cm of seventeen FR II radio galaxies with 0.15" (in en). Monthly Notices of the Royal Astronomical Society 288 (4): 859–890. doi:10.1093/mnras/288.4.859. ISSN 0035-8711.
Coordinates: 
00h 43m 09.21s, +52° 03′ 33.5″
 |  |
