| NGC4981 | |
|---|---|
| 👁 Image NGC 4981 imaged by ESO's Very Large Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Virgo |
| Right ascension | 13h 08m 48.7580s[1] |
| Declination | −06° 46′ 38.938″[1] |
| Redshift | 0.005597±0.000005[1] |
| Heliocentric radial velocity | 1,678±1 km/s[1] |
| Distance | 72.99 ± 2.10 Mly (22.380 ± 0.645 Mpc)[1] |
| Group or cluster | NGC 4995 group (LGG 333) |
| Apparent magnitude (V) | 12.10[1] |
| Characteristics | |
| Type | SAB(r)bc[1] |
| Size | ~66,500 ly (20.38 kpc) (estimated)[1] |
| Apparent size (V) | 2.8′ × 2.0′[1] |
| Other designations | |
| IRAS 13062-0630, 2MASX J13084873-0646392, MCG -01-34-003, PGC 45574[1] | |
NGC4981 is a barred spiral galaxy in the constellation of Virgo. Its velocity with respect to the cosmic microwave background is 2,002±23 km/s, which corresponds to a Hubble distance of 96.3 ± 6.8 Mly (29.54 ± 2.09 Mpc).[1] However, 20 non-redshift measurements give a closer distance of 72.99 ± 2.10 Mly (22.380 ± 0.645 Mpc).[2] It was discovered by German-British astronomer William Herschel on 17 April 1784.[3][4]
NGC4981 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[1]
NGC 4995 group
[edit]According to A. M. Garcia, NGC4981 is part of the NGC 4995 group (also known as LGG 333). This group of galaxies has at least five members, including NGC 4928 [fr], NGC 4942 [fr], NGC 4995, and IC 4212 [fr].[5]
Supernovae
[edit]Two supernovae have been observed in NGC 4981:
- SN1968I (TypeIa, mag. 13.5) was discovered by Hungarian astronomer Miklós Lovas on 23 April 1968.[6][7]
- SN2007C (TypeIb, mag. 15.9) was discovered by Kōichi Itagaki on 7 January 2007.[8][9]
See also
[edit]References
[edit]- ^ a b c d e f g h i j k l "Results for object NGC 4981". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 17 July 2025.
- ^ "Distance Results for NGC 4981". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 17 July 2025.
- ^ Herschel, W. (1786). "Catalogue of One Thousand New Nebulae and Clusters of Stars". Philosophical Transactions of the Royal Society of London. 76: 457–499. Bibcode:1786RSPT...76..457H. doi:10.1098/rstl.1786.0027.
- ^ Seligman, Courtney. "New General Catalogue Objects: NGC4981". Celestial Atlas. Retrieved 17 July 2025.
- ^ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47. Bibcode:1993A&AS..100...47G.
- ^ Marsden, Brian G. (29 April 1968). "Circular No. 2070". Central Bureau for Astronomical Telegrams. Smithsonian Astrophysical Observatory, IAU. Retrieved 17 July 2025.
- ^ "SN1968I". Transient Name Server. IAU. Retrieved 17 July 2025.
- ^ Nakano, S.; Itagaki, K.; Kadota, K. (2007). "Supernova 2007C in NGC 4981". Central Bureau Electronic Telegrams (798). IAU Central Bureau for Astronomical Telegrams: 1. Bibcode:2007CBET..798....1N.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ "SN2007C". Transient Name Server. IAU. Retrieved 17 July 2025.
External links
[edit]- 👁 Wikimedia Commons logo
Media related to NGC 4981 at Wikimedia Commons - NGC 4981 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
