NGC 7331
Galaxy NGC 7331 |
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Image taken with a 60 cm telescope | |
AladinLite | |
Constellation | Pegasus |
Position equinox : J2000.0 , epoch : J2000.0 |
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Right ascension | 22 h 37 m 04.0 s |
declination | + 34 ° 24 ′ 56 ″ |
Appearance | |
Morphological type | SA (s) b / HII / LINER |
Brightness (visual) | 9.5 likes |
Brightness (B-band) | 10.3 mag |
Angular expansion | 10.2 ′ × 4.2 ′ |
Position angle | 171 ° |
Surface brightness | 13.4 mag / arcmin² |
Physical data | |
Affiliation | NGC-7331 group LGG 459 |
Redshift | 0.002732 ± 0.000017 |
Radial velocity | (818 ± 5) km / s |
Stroke distance v rad / H 0 |
(46 ± 3) · 10 6 ly (14.1 ± 1.0) Mpc |
history | |
discovery | Wilhelm Herschel |
Discovery date | September 6, 1784 |
Catalog names | |
NGC 7331 • UGC 12113 • PGC 69327 • CGCG 514-068 • MCG + 06-49-45 • IRAS 22347 + 3409 • 2MASX J22370410 + 3424573 • GC 4815 • H I 53 • h 2172 • |
NGC 7331 is a spiral galaxy of Hubble type Sbc in the constellation Pegasus at the northern sky . It is estimated to be 46 million light-years away from the Milky Way and has a disk diameter of about 140,000 ly. a. the dwarf galaxy NGC 7337 .
The object was discovered on September 6, 1784 by the German-British astronomer Wilhelm Herschel .
High-resolution image from the Hubble Space Telescope
Mid- infrared image taken by the Spitzer Space Telescope
NGC 7331 group (LGG 459)
Galaxy | Alternative name | Distance / million Lj |
---|---|---|
NGC 7331 | PGC 69327 | 46 |
NGC 7320 | PGC 69270 | 45 |
NGC 7363 | PGC 69580 | 310 (?) |
PGC 69173 | UGC 12082 | 45 |
PGC 69019 | UGC 12060 | 49 |
Web links
- Astronomy pages Stefan Heutz
- Image from the Stargazer Observatory ( Memento from February 21, 2012 in the Internet Archive )
- NGC7331
- Astronews.com: Picture of the day January 30, 2018
- Spektrum.de : Amateur recordings [1] [2] [3] [4]