Astronomy:NGC 4999
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Short description: Galaxy in the constellation Virgo
| 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] |
| Helio 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] | |
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]
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "By Name | NASA/IPAC Extragalactic Database". https://ned.ipac.caltech.edu/byname?objname=NGC+4999&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1.
- ↑ 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. doi:10.1093/mnras/stx2990. Bibcode: 2018MNRAS.474.3101J.
- ↑ "New General Catalog Objects: NGC 4950 - 4999". http://cseligman.com/text/atlas/ngc49a.htm.
- ↑ "Reference Lookup | NASA/IPAC Extragalactic Database". https://ned.ipac.caltech.edu/reflookup?refcode=2018MNRAS.474.3101J.
- ↑ "Reference Lookup | NASA/IPAC Extragalactic Database". https://ned.ipac.caltech.edu/reflookup?refcode=2017ApJS..230...24B.
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