NGC 4999 is a barred spiral galaxy located in the constellation Virgo, first discovered February 24, 1786 by astronomer William Herschel.[3] The galaxy is noted as a particularly bright ultraviolet light source – it is believed that its notable bar structure suppresses star formation,[4] indicating this ultraviolet light may possibly be due to a quasi-stellar object.[5]
| NGC 4999 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 13h 09m 33.131s[1] |
| Declination | 01° 40′ 23.01″[1] |
| Redshift | 0.01879[1] |
| Heliocentric radial velocity | 5633 ± 2 km/s[1] |
| Distance | 257 Mly (78.7 Mpc)[2] |
| Apparent magnitude (B) | 13.5 |
| Characteristics | |
| Type | SB(r)b[1] |
| Apparent size (V) | 2.3' × 1.9' |
| Other designations | |
| UGC 8236, MCG +00-34-010, PGC 45632[1] | |
See also
editReferences
edit- ^ a b c d e f "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu.
- ^ James, P. A.; Percival, S. M. (2018). "Star formation suppression and bar ages in nearby barred galaxies". Monthly Notices of the Royal Astronomical Society. 474 (3): 3101–3109. arXiv:1711.10537. Bibcode:2018MNRAS.474.3101J. doi:10.1093/mnras/stx2990.
- ^ "New General Catalog Objects: NGC 4950 - 4999". cseligman.com.
- ^ "Reference Lookup | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu.
- ^ "Reference Lookup | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu.