NGC7331 · NGC 7331
| Chinese name | NGC 7331 |
|---|---|
| Type | Galaxy |
| Constellation | Peg |
| RA | 22h37m |
| Dec | +34° |
| Apparent magnitude | 9.5ᵐ |
| Hemisphere | Northern |
| Best season | Autumn |
| Difficulty | Hard |
| Focal length | 长焦 1000mm+ |
About
NGC 7331 lies about 40 million light-years away in Pegasus and is a highly inclined large spiral often called a 「Milky Way analog」 for its resemblance to our Galaxy. Clear dust lanes lie in front of its bright yellow bulge, which is unusually luminous and contains a counter-rotating inner stellar disk. Along the same line of sight scatter four far more distant background galaxies (collectively nicknamed the 「Deer Lick Group」), creating a real sense of deep-space depth. The famous compact group Stephan's Quintet sits within half a degree and can share the frame. With near and far galaxies grouped in one field, it offers striking deep-sky depth and is a popular autumn long-focus galaxy target.