NGC 4445
| Galaxy NGC 4445 / IC 793 |
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![NGC 4445 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC4445_-_SDSS_DR14.jpg)
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| NGC 4445 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 15.928 s |
| declination | + 09 ° 26 ′ 10.31 ″ |
| Appearance | |
| Morphological type | Sab: / sp / LINER / HII |
| Brightness (visual) | 12.9 mag |
| Brightness (B-band) | 13.7 mag |
| Angular expansion | 2.60 × 0.5 |
| Position angle | 106 ° |
| Surface brightness | 13.0 mag / arcmin² |
| Physical data | |
| Affiliation | Virgo cluster NGC 4442 group LGG 288 |
| Redshift | 0.001181 ± 0.000017 |
| Radial velocity | 354 ± 5 km / s |
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Stroke distance v rad / H 0 |
(13 ± 1) x 10 6 ly (3.97 ± 0.29) Mpc |
| history | |
| discovery | Heinrich Louis d'Arrest |
| Discovery date | April 24, 1865 |
| Catalog names | |
| NGC 4445 • IC 793 • UGC 7587 • PGC 40987 • CGCG 070-104 • MCG + 02-32-072 • IRAS F12257 + 0942 • 2MASX J12281593 + 0926106 • VCC 1086 • GALEX ASC J122815.88 + 092612.3 • LDCE 904 NED130 • EVCC 695 | |
NGC 4445 = IC 793 is an active dwarf galaxy with extensive star formation areas of the Hubble type Sab in the constellation Virgo north of the ecliptic . It is estimated to be 13 million light years from the Milky Way and about 10,000 light years in diameter. Together with twelve other galaxies, it forms the NGC 4442 group ( LGG 288 ) and is listed as a member of the Virgo galaxy cluster under catalog number VCC 1118 .
In the same area of the sky are u. a. the galaxies NGC 4424 , NGC 4442 , NGC 4451 , IC 3366 .
The object was discovered on April 24, 1865 by the astronomer Heinrich Louis d'Arrest .