| NGC 4800 | |
|---|---|
 Hubble Space Telescope image of NGC 4800 | |
| Observation data (J2000epoch) | |
| Constellation | Canes Venatici |
| Right ascension | 12h 54m 37.78208s[1] |
| Declination | +46° 31′ 52.2815″[1] |
| Redshift | 0.002972[2] |
| Heliocentric radial velocity | 891±17 km/s[2] |
| Distance | 95 Mly (29.0 Mpc)[3] |
| Apparent magnitude (B) | 12.0[4] |
| Characteristics | |
| Type | SA(rs)b[5] |
| Other designations | |
| NGC 4800,LEDA 43931,2MASX J12543777+4631521[4] | |
NGC 4800 is an isolated[6]spiral galaxy in the constellationCanes Venatici, located at a distance of 95megalight-years from theMilky Way.[3] It was discovered byWilliam Herschel on April 1, 1788.[7] Themorphological classification of this galaxy is SA(rs)b,[5] indicating a spiral galaxy with no visualbar at the nucleus (SA), an incomplete ring structure (rs), and moderately-tightly woundspiral arms (b). The galactic plane is inclined to the line of sight by an angle of 43°, and the long axis is oriented along aposition angle of 25°.[8] There is a weak bar structure at the nucleus that is visible in the infrared.[6]
The galaxy has a low-luminosityactive galactic nucleus with anHII region at the core.[5] The circumnuclear zone contains a double ring structure of "ultra-compact nuclear rings"; the inner ring has a radius of 30 pc and the outer ring's radius is about 130 pc.[6] The upper limit on the mass of the centralsupermassive black hole is estimated as2.0×107 M☉, or 20 million times the mass of the Sun.[9]
Media related toNGC 4800 at Wikimedia Commons