NGC 931
| Galaxy NGC 931 |
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|---|---|
_-_SDSS_DR14.png)
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| NGC 931 with LEDA 212995 in the background | |
| AladinLite | |
| Constellation | triangle |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 28 m 14.5 s |
| declination | + 31 ° 18 ′ 42 ″ |
| Appearance | |
| Morphological type | Sbc / Sy1.5 |
| Brightness (visual) | 13.5 likes |
| Brightness (B-band) | 14.3 mag |
| Angular expansion | 3.9 'x 0.8' |
| Position angle | 72 ° |
| Surface brightness | 14.6 mag / arcmin² |
| Physical data | |
| Redshift | 0.016652 +/- 0.000020 |
| Radial velocity | 4992 ± 6 km / s |
|
Stroke distance v rad / H 0 |
(228 ± 16) · 10 6 ly (69.8 ± 4.9) Mpc |
| history | |
| discovery | Heinrich Louis d'Arrest |
| Discovery date | September 26, 1865 |
| Catalog names | |
| NGC 931 • UGC 1935 • PGC 9399 • CGCG 504-089 • MCG + 05-06-049 • IRAS 02252 + 3105 • KUG 0225 + 310 • 2MASX J02281446 + 3118414 • Mrk 1040 • VV 1027 • LDCE 176 NED006 | |
NGC 931 is a spiral galaxy with an active nucleus of the Hubble-type Sbc in the constellation Triangle in the northern sky . It is estimated to be 228 million light years from the Milky Way and about 260,000 light years in diameter. The galaxies NGC 917 and NGC 940 are located in the same area of the sky .
The Supernova SN 2009lw was observed here.
The object was discovered by Heinrich Louis d'Arrest on September 26, 1865 .
Web links
Commons : NGC 931 - collection of images, videos, and audio files
