NGC 4442
| Galaxy NGC 4442 |
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|---|---|
![NGC 4442 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC4442_-_SDSS_DR14.jpg)
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| NGC 4442 SDSS image | |
| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 28 m 03.883 s |
| declination | + 09 ° 48 ′ 13.36 ″ |
| Appearance | |
| Morphological type | SB (s) 0 ^ 0 ^ |
| Brightness (visual) | 10.4 mag |
| Brightness (B-band) | 11.4 mag |
| Angular expansion | 4.50 × 1.8 |
| Position angle | 87 ° |
| Surface brightness | 12.5 mag / arcmin² |
| Physical data | |
| Affiliation | Virgo cluster NGC 4442 group LGG 288 |
| Redshift | 0.001825 ± 0.000017 |
| Radial velocity | 547 ± 5 km / s |
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Stroke distance v rad / H 0 |
(22 ± 2) · 10 6 ly (6.63 ± 0.47) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 15, 1784 |
| Catalog names | |
| NGC 4442 • UGC 7583 • PGC 40950 • CGCG 070-100 • MCG + 02-32-068 • 2MASX J12280389 + 0948130 • VCC 1062 • GC 2999 • H II 156 • h 1279 • GALEX ASC J122803.81 + 094812.3 • WISEA J122803 .90 + 094813.3 • LDCE 904 NED128 • EVCC 681 | |
NGC 4442 is a lenticular dwarf galaxy of the Hubble type SB0 in the constellation Virgo at the ecliptic . It is estimated to be 22 million light years from the Milky Way and about 32,000 light years in diameter. It is listed as a member of the Virgo galaxy cluster under catalog number VCC 1062 and is the brightest galaxy of the NGC 4442 group ( LGG 288 ). Gravitational binding with PGC 40974 is possible .
In the same area of the sky are u. a. the galaxies NGC 4445 , IC 3412 , IC 3357 , IC 3374 .
The object was discovered on April 15, 1784 by the German-British astronomer Wilhelm Herschel .
NGC 4442 group ( LGG 288 )
| Galaxy | Alternative name | Distance / million ly |
|---|---|---|
| NGC 4424 | PGC 40809 | 17th |
| NGC 4442 | PGC 40950 | 22nd |
| NGC 4445 | PGC 40987 | 13 |
| NGC 4469 | PGC 41164 | 21st |
| NGC 4491 | PGC 41376 | 20th |
| NGC 4526 | PGC 41772 | 25th |
| IC 3381 | PGC 40985 | 28 |
| IC 3414 | PGC 41166 | 21st |
| IC 3521 | PGC 41847 | 24 |
| PGC 41036 | UGC 7596 | 22nd |
| PGC 41258 | UGC 7636 | 10 |
| PGC 41377 | NGC 4486A | 32 |
| PGC 41442 | VCC 1357 | 24 |