NGC 6300 is a barred Seyfert spiral galaxy located in the constellation Ara. It is designated as SB(rs)b in the galaxy morphological classification scheme and was discovered by the Scottish astronomer James Dunlop on 30 June 1826. NGC 6300 is located at about 51 million light years away from earth. It is suspected that a massive black hole (300,000 times the mass of Sun) may be at its center, pulling all the nearby objects into it. In turn, it emits large amounts of X-rays.
NGC 6300 as seen through the Hubble Space Telescope
|Observation data (J2000 epoch)|
|Right ascension||17h 16m 59.5s|
|Declination||−62° 49′ 40″|
|Helio radial velocity||1109±3 km/s|
|Galactocentric velocity||997±5 km/s|
|Distance (comoving)||15.6 million parsecs|
|Distance||50.9 million light years|
|Apparent magnitude (V)||8.78|
|Absolute magnitude (V)||-21.90|
|Size||64,000 light years|
|Apparent size (V)||4.30′ × 2.8′|
|ESO 101-25, VV 734, IRAS17123-6245 and PGC 60001|
References: NASA/IPAC extragalactic datatbase, http://spider.seds.org/
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars. They have quasar-like nuclei (very luminous, distant and bright sources of electromagnetic radiation) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable.Seyfert galaxies account for about 10% of all galaxies and are some of the most intensely studied objects in astronomy, as they are thought to be powered by the same phenomena that occur in quasars, although they are closer and less luminous than quasars. These galaxies have supermassive black holes at their centers which are surrounded by accretion discs of in-falling material. The accretion discs are believed to be the source of the observed ultraviolet radiation. Ultraviolet emission and absorption lines provide the best diagnostics for the composition of the surrounding material.Seen in visible light, most Seyfert galaxies look like normal spiral galaxies, but when studied under other wavelengths, it becomes clear that the luminosity of their cores is of comparable intensity to the luminosity of whole galaxies the size of the Milky Way.Seyfert galaxies are named after Carl Seyfert, who first described this class in 1943.