NGC 4634
| Galaxy NGC 4634 |
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|---|---|
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Berenike's hair |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 42 m 40.9 s |
| declination | + 14 ° 17 ′ 45 ″ |
| Appearance | |
| Morphological type | SBcd: / sp / HII |
| Brightness (visual) | 12.7 mag |
| Brightness (B-band) | 13.4 mag |
| Angular expansion | 2 ′, 9 × 0 ′, 9 |
| Position angle | 156 ° |
| Surface brightness | 13.6 mag / arcmin² |
| Physical data | |
| Affiliation | Virgo cluster |
| Redshift | 0.000991 ± 0.000020 |
| Radial velocity | 297 ± 6 km / s |
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Stroke distance v rad / H 0 |
(11 ± 1) x 10 6 ly (3.52 ± 0.26) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | January 14, 1787 |
| Catalog names | |
| NGC 4634 • UGC 7875 • PGC 42707 • CGCG 099-112 • CGCG 100-002 • MCG + 3-32-086 • IRAS 12401 + 1434 • 2MASX J12424098 + 1417451 • VCC 1932 • GC 3167 • H III-603 • h 1398 • GALEX ASC J124240.86 + 141745.5 • Holm 445B • LDCE 904 NED230 • EVCC 1074 | |
NGC 4634 is a 12.7 likes bright spiral dwarf galaxy with extensive star formation from Hubble type SBc in the constellation Coma Berenices the northern sky . It is estimated to be 11 million light years from the Milky Way and about 10,000 light years in diameter. The galaxy forms the gravitationally bound pair Holm 445 with NGC 4633 and is listed under the catalog number VVC 1932 as part of the Virgo galaxy cluster .
In the same area of the sky are u. a. the galaxies NGC 4611 , IC 3637 , IC 3658 , IC 3735 .
The object was discovered by the astronomer William Herschel on 1787 with its 18.7-inch reflector.