NGC 5806
Coordinates: 
15h 00m 00.40s, +1° 53′ 27″
15h 00m 00.40s, +1° 53′ 27″J2000 epoch) | |
|---|---|
| Constellation | Virgo |
| Right ascension | 15h 00m 00.400s[1] |
| Declination | +01° 53′ 28.70″[1] |
| Redshift | 0.00450[2] |
| Heliocentric radial velocity | 1346 ± 21 km/s[2] |
| Distance | 68 Mly (21 Mpc)[3] |
| Apparent magnitude (V) | 11.70[3] |
| Apparent magnitude (B) | 12.40[3] |
| Characteristics | |
| Type | SAB(s)b[1][3] |
| Apparent size (V) | 3.1′ × 1.6′[3] |
| Other designations | |
| UGC 9645, MCG +00-38-014, PGC 53578[2] | |
NGC 5806 is an
NGC 5846 Group.[2]
NGC 5806 contains a star that was catalogued as a
supernova imposter. The progenitor was detected as a cool hypergiant with an absolute visual magnitude of −9 and 400,000 times more luminous than the sun. The eruption saw it increase in luminosity to around 80,000,000 L☉.[5]
NGC 5806 has also hosted several true supernova. SN 2004dg, around 100 times brighter than SN Hunt 248 was a typical type II supernova. The progenitor has not been detected and is expected to have been a relatively low mass, low luminosity, red supergiant.[6] PTF12os in 2012 was a type IIb supernova that occurred in 2012, and iPTF13bvn was a type Ib supernova that exploded in 2013.[7]
References
- ^ a b c "Results for object NGC 5806 (NGC 5806)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-02-21.
- ^ a b c d "NGC 5806". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-21.
- ^ S2CID 119085482.
- ^ Seligman, Courtney. "New General Catalogue objects: NGC 5800 - 5849". cseligman.com. Retrieved 2021-02-21.
- S2CID 11415725.
- S2CID 3228766.
- S2CID 54028503.
External links
Media related to NGC 5806 at Wikimedia Commons- An LBV masquerading as a cool hypergiant
- ESA/Hubble Picture of the Week showing SN 2004dg
