NGC 4021
Galaxy NGC 4021 |
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NGC 4021 SDSS image | |
AladinLite | |
Constellation | Berenike's hair |
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 |
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 .