NGC 4340
Galaxy NGC 4340 |
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SDSS image of NGC 4350 & NGC 4340 & LEDA 213984 (r) | |
AladinLite | |
Constellation | Berenike's hair |
Position equinox : J2000.0 , epoch : J2000.0 |
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Right ascension | 12 h 23 m 35.3 s |
declination | + 16 ° 43 ′ 20 ″ |
Appearance | |
Morphological type | SB (r) 0+ |
Brightness (visual) | 11.2 mag |
Brightness (B-band) | 12.1 mag |
Angular expansion | 3 ′ × 2 ′ |
Position angle | 102 ° |
Surface brightness | 13.0 mag / arcmin² |
Physical data | |
Affiliation | Virgo cluster NGC 4343 group Messier 49 group LGG 292 |
Redshift | 0.003112 ± 0.000017 |
Radial velocity | 933 ± 5 km / s |
Stroke distance v rad / H 0 |
(40 ± 3) x 10 6 ly (12.2 ± 0.9) Mpc |
diameter | 55,000 ly |
history | |
discovery | William Herschel |
Discovery date | March 21, 1784 |
Catalog names | |
NGC 4340 • UGC 7467 • PGC 40245 • CGCG 099-036 • MCG + 03-32-021 • 2MASX J12233531 + 1643199 • VCC 654 • GC 2891 • H II 85 • h 1212 • GALEX ASC J122335.37 + 164321.0 • LDCE 904 NED079 • HOLM 391B • EVCC 2089 |
NGC 4340 , is a lenticular galaxy of the Hubble type SB0 / a in the constellation Haar der Berenike in the northern sky . It is estimated to be 40 million light years from the Milky Way and about 35,000 light years in diameter . Together with NGC 4350 , it forms the gravitationally bound galaxy pair Holm 391 . Cataloged under catalog number VCC 654 as a member of the Virgo Galaxy Cluster.
The galaxies NGC 4383 , IC 787 , IC 3298 , IC 3340 are located in the same area of the sky .
The supernova SN 1977A, which reached a visual magnitude of 16.2 mag, was observed here.
The object was discovered on March 21, 1784 by the astronomer William Herschel with the help of his 18.7-inch mirror telescope.
Web links
Commons : NGC 4340 - collection of images, videos, and audio files
Individual evidence
- ^ Aladin Lite
- ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c d e f SEDS : NGC 4340
- ^ VizieR
- ↑ Simbad
- ↑ R. Barbon, V. Buondi, E. Cappellaro, M. Turatto: The Asiago Supernova Catalog - 10 years after . In: Astronomy and Astrophysics Supplement Series . tape 139 , no. 3 , November 1999, ISSN 0365-0138 , p. 531-536 , doi : 10.1051 / aas: 1999404 ( aanda.org [accessed April 30, 2020]).
- ↑ Seligman