NGC 7331 and Stephan's Quintet
Two showpieces of Pegasus in one field. NGC 7331 — the anchor of the "Deer Lick Group" — is a graceful flocculent spiral about 40 million light-years away, once considered a twin of the Milky Way; the smaller galaxies scattered behind it are ten times more distant, a chance line-of-sight grouping. In the same frame sits Stephan's Quintet, the first compact galaxy group ever discovered (1877): four of its five members are locked in a slow-motion collision some 290 million light-years out.
- Coordinates: RA 22h 37m 04s, Dec +34° 24′ 56″ (Pegasus)
- Optics: Askar 107PHQ
- Camera: ZWO ASI2600MM DUO
- Mount: Sky-Watcher Wave 150i
- Filters: Baader LRGB (CMOS-optimized), 2 in
- Published: 2025-09-11 — on AstroBin