NGC 708
Galaxy in the constellation Andromeda
From Wikipedia, the free encyclopedia
NGC 708 is an elliptical galaxy located 240 million light-years away[1] in the constellation Andromeda. It was discovered by German-British astronomer William Herschel on September 21, 1786.[2] It is classified as a cD galaxy[3][4] and is the brightest member of Abell 262.[5][6] NGC 708 is a weak[7] FR I radio galaxy[8][9][10][11][12] and is also classified as a type 2 Seyfert galaxy.[7][13][1]
| NGC 708 | |
|---|---|
NGC 708 imaged by Pan-STARRS | |
| Observation data (J2000 epoch) | |
| Constellation | Andromeda |
| Right ascension | 01h 52m 46.4467s[1] |
| Declination | +36° 09′ 06.581″[1] |
| Redshift | 0.015886[1] |
| Heliocentric radial velocity | 4762 km/s[1] |
| Distance | 232.05 ± 16.32 Mly (71.147 ± 5.005 Mpc)[1] |
| Group or cluster | Abell 262 |
| Apparent magnitude (V) | 13.70[1] |
| Characteristics | |
| Type | E[1] |
| Size | ~200,000 ly (62 kpc) (estimated)[1] |
| Apparent size (V) | 3.0′ × 2.5′[1] |
| Other designations | |
| B2 0149+35, HOLM 049A, UGC 1348, MCG +06-05-031, PGC 6962, CGCG 522-039[1] | |
NGC 708 is surrounded by 4,700 globular clusters.[14]
Dust lane
Discovered in 1979 by Kotanyi et al., NGC 708 has a thin dust lane[15] with an irregular structure.[16][17][18][4] Besides the dust lane, there are also patches of dust that cross the nucleus.[16][17][18] These features are oriented nearly perpendicular to the radio emission of the galaxy.[19][20][12][7][5] The lane appears to be a nearly edge-on dust disk[21] with a length of 16,000 ly (5 kpc).[22]
The dust lane appears to have formed from a cooling accretion flow of intracluster medium (ICM) onto NGC 708.[22]
