NGC 4977
| Galaxy NGC 4977 |
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|---|---|
![NGC 4977 [1] SDSS](https://de.wikipedia.org/wiki/Datei:NGC4977_-_SDSS_DR14.jpg)
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| NGC 4977 SDSS | |
| AladinLite | |
| Constellation | Big Bear |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 13 h 06 m 04.427 s |
| declination | + 55 ° 39 ′ 21.91 ″ |
| Appearance | |
| Morphological type | SA (r) b / LINER |
| Brightness (visual) | 13.8 mag |
| Brightness (B-band) | 14.6 mag |
| Angular expansion | 2.0 ′ × 2.0 ′ |
| Surface brightness | 15.2 mag / arcmin² |
| Physical data | |
| Redshift | 0.027783 ± 0.000157 |
| Radial velocity | 8329 ± 47 km / s |
|
Stroke distance v rad / H 0 |
(377 ± 26) · 10 6 ly (115.5 ± 8.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 14, 1789 |
| Catalog names | |
| NGC 4977 • UGC 8196 • PGC 45339 • CGCG 270-053 • CGCG 271-009 • MCG + 09-22-010 • 2MASX J13060447 + 5539218 • GC 3414 • H III 780 • GALEX ASC J130604.56 + 553920.3 • LDCE 941 NED003 • NVSS J130604 + 553921 • WISEA J130604.43 + 553921.6 | |
NGC 4977 is a 13.8 mag bright spiral galaxy of the Hubble type Sb with an active galaxy core in the constellation Great Bear in the northern sky . It is an estimated 377 million light years from the Milky Way and about 220,000 light years in diameter.
In the same area of the sky is u. a. the galaxy NGC 4964 .
The object was discovered on April 14, 1789 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "cF, S".