NGC 4319
| Galaxy NGC 4319 = NGC 4345 |
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| NGC 4319 & PGC 39975 Hubble Space Telescope | |
| AladinLite | |
| Constellation | Dragon |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 21 m 43.87 s |
| declination | + 75 ° 19 ′ 21.3 ″ |
| Appearance | |
| Morphological type | SB (r) from / AGN |
| Brightness (visual) | 12.0 mag |
| Brightness (B-band) | 12.8 mag |
| Angular expansion | 2.8 ′ × 2.1 ′ |
| Position angle | 160 ° |
| Surface brightness | 13.8 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 4291 group NGC 4386 group NGC 4589 group LGG |
| Redshift | 0.004923 ± 0.000080 |
| Radial velocity | 1476 ± 24 km / s |
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Stroke distance v rad / H 0 |
(72 ± 5) x 10 6 ly (22.2 ± 1.6) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | December 10, 1797 |
| Catalog names | |
| NGC 4319/4345 • UGC 7429 • PGC 39981 • CGCG 352-029 • MCG + 13-09-25 • IRAS 12195 + 7535 • 2MASX J12214384 + 7519214 • GC 2888 • H I 276 • h 1210 • 2MASS J12214390 + 7519212 • LDCE 902 NED005 | |
NGC 4319 = NGC 4345 is a barred spiral galaxy with an active galactic nucleus from Hubble type SBab in the constellation Draco the northern sky . It is estimated to be 72 million light years from the Milky Way and about 60,000 light years across. It is a member of the eleven galaxies NGC 4589 group ( LGG 284 ).
Nearby is the quasar Markarjan 205 , a relatively close quasar at a billion light years away. Although NGC 4319, with its redshift of z = + 0.0045, is only 80 million light-years away from the solar system, observations indicate a gravitational interaction between the two objects. From these observations, the American astronomer Halton Arp put forward the controversial hypothesis in 1971 that the distances of Markarjan 205 and NGC 4319 to Earth are about the same and that there must be another reason for the large differences in redshift.
For example, there could have been interactions between NGC 4319 and the neighboring galaxy NGC 4291 .
The object was discovered on December 10, 1797 by the German-British astronomer Wilhelm Herschel . The galaxy was rediscovered by Gerhard Lohse in 1886 and listed in the NGC catalog as NGC 4345.
