NGC 4221
| Galaxy NGC 4221 |
|
|---|---|
![NGC 4221 with LEDA 213957 [1] (l), SDSS mount](https://de.wikipedia.org/wiki/Datei:NGC4221_-_SDSS_DR14.jpg)
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| NGC 4221 with LEDA 213957 (l), SDSS image | |
| AladinLite | |
| Constellation | Dragon |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 15 m 59.8 s |
| declination | + 66 ° 13 ′ 51 ″ |
| Appearance | |
| Morphological type | (R) SB (r) 0 + |
| Brightness (visual) | 12.5 mag |
| Brightness (B-band) | 13.4 mag |
| Angular expansion | 2.2 'x 1.7' |
| Position angle | 25 ° |
| Surface brightness | 13.8 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 4256 group LGG 277 |
| Redshift | 0.004419 ± 0.000066 |
| Radial velocity | 1325 ± 20 km / s |
|
Stroke distance v rad / H 0 |
(65 ± 5) x 10 6 ly (19.8 ± 1.4) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | April 3, 1832 |
| Catalog names | |
| NGC 4221 • UGC 7288 • PGC 39266 • CGCG 315-029 • MCG + 11-15-040 • 2MASX J12155994 + 6613504 • GALEX ASC J121559.81 + 661350.2 • LDCE 867 NED093 | |
NGC 4221 is a lenticular galaxy of the Hubble type SB0 / a in the constellation Dragon in the northern sky . It is estimated to be 65 million light years from the Milky Way and about 40,000 light years in diameter.
Together with NGC 4108 , NGC 4210 , NGC 4332 , NGC 4256 , NGC 4513 and PGC 38461 , it forms the NGC 4256 group .
The object was discovered by John Herschel on April 3, 1832 .