NGC 7771
| Galaxy NGC 7771 |
|
|---|---|
![NGC 7771 & NGC 7770 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC7771_-_SDSS_DR14.jpg)
|
|
| NGC 7771 & NGC 7770 SDSS image | |
| AladinLite | |
| Constellation | Pegasus |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 23 h 51 m 24.805 s |
| declination | + 20 ° 06 ′ 42.27 ″ |
| Appearance | |
| Morphological type | SB (n) a / HII / LIRG / Sbrst |
| Brightness (visual) | 12.1 mag |
| Brightness (B-band) | 13.0 likes |
| Angular expansion | 2.4 '× 1.1' |
| Position angle | 68 ° |
| Surface brightness | 13.0 mag / arcmin² |
| Physical data | |
| Affiliation | WBL 726 NGC 7771 group LGG 483 |
| Redshift | 0.014267 ± 0.000007 |
| Radial velocity | 4277 ± 2 km / s |
|
Stroke distance v rad / H 0 |
(198 ± 14) · 10 6 ly (60.8 ± 4.3) Mpc |
| diameter | 140,000 ly |
| history | |
| discovery | William Herschel |
| Discovery date | September 18, 1784 |
| Catalog names | |
| NGC 7771 • UGC 12815 • PGC 72638 • CGCG 455-058 • MCG + 03-60-035 • IRAS 23488 + 1949 • KUG 2348 + 198C • 2MASX J23512488 + 2006425 • Mrk 9006 • GC 5022 • H II 231 • h 2275 • GALEX ASC J235124.82 + 200641.5 • LDCE 1598 NED003 • HOLM 820A • KTG 82C | |
NGC 7771 is an active bar-spiral galaxy with a high rate of star formation of the Hubble type SBa in the constellation Pegasus in the northern sky . It is about 198 million light years away from the Milky Way and has a diameter of about 140,000 light years. The galaxy forms together with NGC 7769 and 7770 NGC the gravitationally bound galaxies Trio spar 820 or KTG 82 and is considered a member of the NGC 7771 group ( LGG 483 ).
The type II supernova SN 2003hg was observed here.
The object was discovered on September 18, 1784 by the astronomer William Herschel .
NGC 7771 group ( LGG 483 )
| Galaxy | Alternative name | Distance / million ly |
|---|---|---|
| NGC 7769 | PGC 72615 | 195 |
| NGC 7771 | PGC 72638 | 198 |
| NGC 7786 | PGC 72870 | 201 |
| NGC 7770 | PGC 72635 | 195 |
| UGC 12828 | PGC 72749 | 202 |
Web links
Commons : NGC 7771 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- Spektrum .de: amateur recordings [1] , labeled map of the area