| NGC 7205 | |
|---|---|
 NGC 7205 (left) by Legacy Surveys | |
| Observation data (J2000epoch) | |
| Constellation | Indus |
| Right ascension | 22h 08m 34.3225s[1] |
| Declination | −57° 26′ 33.354″[1] |
| Redshift | 0.005623 ± 0.000019[1] |
| Heliocentric radial velocity | 1,686 ± 6 km/s[1] |
| Distance | 61.9 ± 6.6Mly (19.0 ± 2.0Mpc)[1] |
| Apparent magnitude (V) | 10.8[2] |
| Characteristics | |
| Type | SA(s)bc[1] |
| Size | ~67,400 ly (20.65 kpc) (estimated)[1] |
| Apparent size (V) | 4.1′ × 2.0′[1] |
| Other designations | |
| ESO 146- G 009, AM 2205-574,IRAS 22052-5741,PGC 68128[1] | |
NGC 7205 is aspiral galaxy in the constellationIndus. The galaxy lies about 60 millionlight years away from Earth based on redshift independent methods, which means, given its apparent dimensions, that NGC 7205 is approximately 70,000 light years across.[1] It was discovered byJohn Herschel on June 10, 1834.[3]
Although the galaxy is characterised as unbarred, Eskridge found evidence that the galaxy has aweak bar. The galaxy has twospiral arms arranged in agrand design pattern. The arms can be traced for a full revolution, but both arms appear to branch after completing half a revolution.[4] The galaxy is asymmetric. TheHII regions at the north and eastern parts of the galaxy are more luminous inH-alpha than the rest. They appear to be complex, being composed from multiple star formation regions.[5] The largest of the HII regions are 3 arcseconds across.[6] In the centre of the galaxy lies asupermassive black hole, whose mass is estimated to be 106.68 ± 0.41 (2 - 12 millions)M☉, based on the pitch angle of the spiral arms.[7]
NGC 7205 forms a non interacting pair with NGC 7205A, lying 8.5 arcminutes away.[8] NGC 7205 is a member of theTelescopium−Grus Cloud.[9]
