NGC 7731
| Galaxy NGC 7731 |
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|---|---|
![NGC 7732 & NGC 7731 [1]](https://de.wikipedia.org/wiki/Datei:NGC7731_-_SDSS_DR14.jpg)
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| NGC 7732 & NGC 7731 | |
| AladinLite | |
| Constellation | fishes |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 23 h 41 m 29.069 s |
| declination | + 03 ° 44 ′ 24.06 ″ |
| Appearance | |
| Morphological type | (R) SBa |
| Brightness (visual) | 13.2 mag |
| Brightness (B-band) | 14.1 mag |
| Angular expansion | 1.4 '× 1.1' |
| Position angle | 95 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 7757 group LGG 482 |
| Redshift | 0.009627 ± 0.000017 |
| Radial velocity | 2886 ± 5 km / s |
|
Stroke distance v rad / H 0 |
(135 ± 9) x 10 6 ly (41.3 ± 2.9) Mpc |
| history | |
| discovery | Albert Marth |
| Discovery date | October 27, 1864 |
| Catalog names | |
| NGC 7731 • UGC 12737 • PGC 72128 • CGCG 381-025 • MCG + 00-60-034 • 2MASX J23412911 + 0344238 • WISEA J234129.08 + 034424.1 • HOLM 813B • KPG 590A | |
NGC 7731 is a barred spiral galaxy of the Hubble type SBa in the constellation Pisces on the ecliptic . It is estimated to be 135 million light years away from the Milky Way and about 65,000 light years in diameter. Together with NGC 7732 it forms the gravitationally bound galaxy pair Holm 813 or KPG 590 and together with three other galaxies the NGC 7757 group ( LGG 482 ).
The object was discovered by Albert Marth on October 27, 1864 .