Messier 94
| Galaxy Messier 94 / NGC 4736 |
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|---|---|
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| Image taken with a 50 cm telescope | |
| AladinLite | |
| Constellation | Hunting dogs |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 50 m 53.0 s |
| declination | + 41 ° 07 ′ 14 ″ |
| Appearance | |
| Morphological type | (R) SA (r) from / Sy2 / LINER |
| Brightness (visual) | 8.1 likes |
| Brightness (B-band) | 8.9 likes |
| Angular expansion | 14.4 ′ × 12.1 ′ |
| Position angle | 117 ° |
| Surface brightness | 13.6 mag / arcmin² |
| Physical data | |
| Affiliation |
Canes Venatici II group LGG 290 |
| Redshift | +0.001027 ± 0.000005 |
| Radial velocity | +308 ± 1 km / s |
|
Stroke distance v rad / H 0 |
(16 ± 1) x 10 6 ly (4.93 ± 0.35) Mpc |
| history | |
| discovery | Pierre Méchain |
| Discovery date | March 22, 1781 |
| Catalog names | |
| M 94 • NGC 4736 • UGC 7996 • PGC 43495 • CGCG 217-001 / 216-034 • MCG + 07-26-058 • IRAS 12485 + 4123 • 2MASX J12505314 + 4107125 • GC 3258 • h 1456 • HIJASS J1250 + 41 • LDCE 867 NED128 | |
Messier 94 = NGC 4736 is a spiral galaxy of the Hubble type Sab with the dimensions 14.4 '× 12.1' and the apparent magnitude of +8.1 mag in the constellation Hounds in the northern sky . It is an estimated 16 million light years from the Milky Way and about 60,000 light years in diameter.
It is one of the brightest galaxies in the Canes Venatici I group , a group of galaxies in the vicinity of the Local Group within the Virgo supercluster .
In the same area of the sky are u. a. the galaxies IC 3795 , IC 3808 , IC 3835 , IC 3842 .
properties
It is a LINER galaxy, a form of AGN galaxy whose core region contains weakly ionized gas.
The galaxy contains two rings, the inner one of which is characterized by a very high rate of star formation, which in turn is caused by the ejection of gas from the center. M94 is therefore also classified as a starburst galaxy .
GALEX total image in the ultraviolet spectral range from Messier 94
Infrared image using the Spitzer Space Telescope
Photo of the center with the Hubble Space Telescope , the surrounding ring with the high rate of star formation can be seen.
discovery
The object was discovered on March 22, 1781 by the French astronomer Pierre Méchain .
Web links
- SIMBAD Astronomical Database
- astronews.com: Picture of the day October 20, 2015
- Spektrum.de : Amateur recordings [1] [2]