NGC 4021
| Galaxy NGC 4021 |
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|---|---|
![NGC 4021 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC4021_-_SDSS_DR14.jpg)
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| NGC 4021 SDSS image | |
| AladinLite | |
| Constellation | Berenike's hair |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 11 h 59 m 02.595 s |
| declination | + 25 ° 00 ′ 59.58 ″ |
| Appearance | |
| Morphological type | E. |
| Brightness (visual) | 14.8 mag |
| Brightness (B-band) | 15.8 mag |
| Angular expansion | 0.40 ′ × 0.3 ′ |
| Position angle | 85 ° |
| Surface brightness | 12.6 mag / arcmin² |
| Physical data | |
| Affiliation | WBL 368 |
| Redshift | 0.033543 ± 0.000173 |
| Radial velocity | 10,056 ± 52 km / s |
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Stroke distance v rad / H 0 |
(448 ± 31) · 10 6 ly (137.4 ± 9.6) Mpc |
| history | |
| discovery | Johan Dreyer |
| Discovery date | April 26, 1878 |
| Catalog names | |
| NGC 4021 • PGC 37730 • CGCG 127-124 • MCG + 04-28-112 • 2MASX J11590257 + 2504596 • GALEX ASC J115902.53 + 250457.9 • NSA 160848 • WISEA J115902.59 + 250459.5 | |
NGC 4021 is a compact elliptical galaxy of the Hubble type E3 in the constellation Coma Berenices in the northern sky . It is an estimated 448 million light years from the Milky Way and about 55,000 light years in diameter.
In the same area of the sky are u. a. the galaxies NGC 4011 , NGC 4015 , NGC 4022 , NGC 4023 .
The object was discovered by Johan Dreyer on April 26, 1878 .