NGC 4841
| Galaxy NGC 4841 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Berenike's hair |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 57 m 32.9 s |
| declination | + 28 ° 28 ′ 46 ″ |
| Appearance | |
| Morphological type | A: E4 B: E3 |
| Brightness (visual) | A: 13.1 mag B: 13.0 mag |
| Brightness (B-band) | A: 14.1 mag B: 14.0 mag |
| Angular expansion | A: 1.6 ′ × 1.0 ′ B: 1.0 ′ × 0.7 ′ |
| Position angle | A: 124 ° B: 134 ° |
| Surface brightness | A: 13.7 mag / arcmin² B: 12.7 mag / arcmin² |
| Physical data | |
| Redshift | 0.022629 |
| Radial velocity | 6784 km / s |
|
Stroke distance v rad / H 0 |
(304 ± 21) · 10 6 ly (93.1 ± 6.5) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 11, 1785 |
| Catalog names | |
| NGC 4841, 4841A, 4841B, 4841-1, 4841-2 • UGC 8072, 8073 • PGC 44323, 44329 • CGCG 160-044 • MCG + 05-31-026, + 05-31-027 • GC 3331 • H II 387 • h 1493 • spar 492 | |
NGC 4841 consists of two separate galaxies; NGC 4841 A (also NGC 4841–1 ) is a 13.1 mag bright elliptical galaxy of the Hubble type E4; NGC 4841 B (also NGC 4841–1 ) a 13.0 mag bright elliptical galaxy of the Hubble type E3. Both galaxies form a gravitational double galaxy in the constellation Haar der Berenike and are about 304 million light years away from the Milky Way.
They were discovered on April 11, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described them as "F, pL".
Web links
- NGC 4841. SIMBAD, accessed February 18, 2015 .