NGC 7798
| Galaxy NGC 7798 |
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|---|---|
![NGC 7798 [1] SDSS image](https://de.wikipedia.org/wiki/Datei:NGC7798_-_SDSS_DR14.jpg)
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| NGC 7798 SDSS image | |
| AladinLite | |
| Constellation | Pegasus |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 23 h 59 m 25.50 s |
| declination | + 20 ° 44 ′ 59.5 ″ |
| Appearance | |
| Morphological type | SBc / Sbrst |
| Brightness (visual) | 12.4 mag |
| Brightness (B-band) | 13.0 likes |
| Angular expansion | 1.4 '× 1.3' |
| Position angle | 51 ° |
| Surface brightness | 12.8 mag / arcmin² |
| Physical data | |
| Redshift | 0.008016 ± 0.000003 |
| Radial velocity | 2403 ± 1 km / s |
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Stroke distance v rad / H 0 |
(114 ± 8) x 10 6 ly (35.1 ± 2.5) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | September 18, 1784 |
| Catalog names | |
| NGC 7798 • UGC 12884 • PGC 73163 • CGCG 456-009 • MCG + 03-01-010 • IRAS 23568 + 2028 • KUG 2356 + 204 • 2MASX J23592550 + 2044595 • Mrk 332 • GC 5038 • H II 232 • h 2290 • HIPASS J2359 + 20 • NSA 153017 • WISEA J235925.50 + 204459.6 | |
NGC 7798 is a barred spiral galaxy of the Hubble type SBc with a high rate of star formation in the constellation Pegasus in the northern sky . It is estimated to be 114 million light years from the Milky Way and about 45,000 light years across.
The object was discovered by Wilhelm Herschel on September 18, 1784 .