NGC 797
| Galaxy NGC 797 |
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|---|---|
![NGC 797 & LEDA 212899 (ru on the spiral arm) [1]](https://de.wikipedia.org/wiki/Datei:NGC_0797_DSS.jpg)
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| NGC 797 & LEDA 212899 (ru on the spiral arm) | |
| AladinLite | |
| Constellation | Andromeda |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 03 m 26.3 s |
| declination | + 38 ° 06 ′ 52 ″ |
| Appearance | |
| Morphological type | SAB (s) a |
| Brightness (visual) | 12.7 mag |
| Brightness (B-band) | 13.6 mag |
| Angular expansion | 1.6 ′ × 1.3 ′ |
| Position angle | 65 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.018860 ± 0.000013 |
| Radial velocity | 5654 ± 4 km / s |
|
Stroke distance v rad / H 0 |
(259 ± 18) · 10 6 ly (79.3 ± 5.6) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 21, 1786 |
| Catalog names | |
| NGC 797 • UGC 1541 • PGC 7832 • CGCG 522-105 • MCG + 06-05-078 • IRAS F02004 + 3752 • 2MASX J02032791 + 3807012 • VV 428 • GC 481 • H III 566 • h 189 • 5ZW 170 • NPM1G + 37.0077 | |
NGC 797 is a barred spiral galaxy of the Hubble type SBa in the constellation Andromeda in the northern sky . It is estimated to be 259 million light years from the Milky Way and about 120,000 light years in diameter. Together with NGC 801 , it forms a gravitationally bound galaxy pair.
In the same area of the sky are u. a. the galaxies IC 179 .
The object was discovered on September 21, 1786 by the German-British astronomer Friedrich Wilhelm Herschel .
Web links
- SIMBAD Astronomical Database
- Auke Slotegraaf : NGC 797. Deep Sky Observer's Companion, accessed on March 21, 2016 .
- NGC 797. DSO Browser, accessed March 21, 2016 .