NGC 925
| Galaxy NGC 925 |
|
|---|---|
|
|
| Shot with a 32 inch reflector | |
| AladinLite | |
| Constellation | triangle |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 02 h 27 m 16.9 s |
| declination | + 33 ° 34 ′ 45 ″ |
| Appearance | |
| Morphological type | SAB (s) d / HII |
| Brightness (visual) | 9.9 likes |
| Brightness (B-band) | 10.6 mag |
| Angular expansion | 10.5 ′ × 5.9 ′ |
| Position angle | 102 ° |
| Surface brightness | 14.2 mag / arcmin² |
| Physical data | |
| Affiliation | NGC-1023 group |
| Redshift | +0.001845 ± 0.000010 |
| Radial velocity | +553 ± 3 km / s |
|
Stroke distance v rad / H 0 |
(30 ± 2) x 10 6 ly (9.1 ± 0.64) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | September 13, 1784 |
| Catalog names | |
| NGC 925 • UGC 1913 • PGC 9332 • CGCG 504-085 • MCG + 05-06-045 • IRAS 02243 + 3321 • KUG 0224 + 333 • 2MASX J02271691 + 3334439 • GC 542 • H III 177 • h 222 • Kara 105, LDCE 0160 NED007 | |
NGC 925 is a bar-spiral galaxy with extensive star formation regions of the Hubble type SBcd in the constellation Triangle in the northern sky . The distance of around 30 million light years can be regarded as very precise, because it is based on measurements by the Hubble Space Telescope on 80 Cepheids - variables of the galaxy. Its diameter reaches 100,000 light years, and astronomers estimate the total mass to be 50 billion solar masses . It has an angular extent of 10 ′, 5 × 5 ′, 9 and an apparent magnitude of 9.9 mag.
The galaxy is part of a group that also includes NGC 891 and NGC 1023 .
The object was discovered on September 13, 1784 by the British astronomer William Herschel .
Image taken by the Spitzer Space Telescope
Web links
Commons : NGC 925 - collection of images, videos and audio files
- NOAO
- NGC-1023 group
- Spektrum.de : Amateur recordings [1] [2] [3] [4]