NGC925 · NGC 925
| Chinese name | NGC 925 |
|---|---|
| Type | Galaxy |
| Constellation | Tri |
| RA | 02h27m |
| Dec | +33° |
| Apparent magnitude | 10.1ᵐ |
| Hemisphere | Northern |
| Best season | Autumn |
| Difficulty | Hard |
| Focal length | 长焦 1000mm+ |
About
NGC 925 lies about 30 million light-years away in Triangulum and is a mid-sized, asymmetric barred spiral. One end of its central bar connects to a more prominent arm while the other trails off loosely, giving an overall ragged structure typical of a late-type SBd barred spiral. Its disk is dotted with pink H II regions and blue young clusters, signs of active star formation. A member of the nearby NGC 1023 Group on the fringe of the Local Group, it was an important Hubble Space Telescope target for calibrating the Cepheid period-luminosity relation and the Hubble constant. Low in surface brightness, it is a rewarding nearby spiral for long exposures in the autumn Triangulum sky.