NGC 7217
| Galaxy NGC 7217 |
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|---|---|
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Pegasus |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 22 h 07 m 52.4 s |
| declination | + 31 ° 21 ′ 33 ″ |
| Appearance | |
| Morphological type | (R) SA (r) ab / Sy / LINER |
| Brightness (visual) | 10.2 mag |
| Brightness (B-band) | 11.0 mag |
| Angular expansion | 4 ′ × 3.4 ′ |
| Position angle | 83 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Redshift | 0.003176 +/- 0.000006 |
| Radial velocity | (952 ± 2) km / s |
|
Stroke distance v rad / H 0 |
(52 ± 4) x 10 6 ly (16.0 ± 1.1) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 7, 1784 |
| Catalog names | |
| NGC 7217 • UGC 11914 • PGC 68096 • CGCG 494-002 • MCG + 05-52-001 • IRAS 22056 + 3106 • 2MASX J22075236 + 3121333 • GC 4760 • H II 207 • h 2149 • LEDA 68096 | |
NGC 7217 is an annular spiral galaxy with an active nucleus of the Hubble-type Sab in the constellation Pegasus in the northern sky . It is estimated to be 52 million light years from the Milky Way and about 45,000 ly in diameter.
The object was discovered on September 7, 1784 by the German-British astronomer Wilhelm Herschel .
Web links
Commons : NGC 7217 - collection of images, videos, and audio files
- SIMBAD Astronomical Database
- GoBlack
- Spektrum.de : Amateur recordings [1] [2]