Caldwell 17
Galaxy in Cassiopeia · 2.4 million light-years
🔭 Explore Caldwell 17 in the 3D map →| Type | Galaxy |
|---|---|
| Constellation | Cassiopeia |
| Distance | 2.4 million light-years |
| Apparent magnitude | 9.7 |
| Apparent size | 9.4′ (arc-minutes) |
| Also known as | C17 · NGC 147 |
Caldwell 17 is a galaxy (NGC 147) in the constellation Cassiopeia — a distant island of stars far beyond the Milky Way. It appears as number 17 in the Caldwell catalogue, Sir Patrick Moore's 1995 list of 109 bright deep-sky objects for amateur astronomers. It spans roughly 9.4 arc-minutes on the sky. At about magnitude 9.7, it shows up in a small backyard telescope.
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Related objects
- Andromeda Galaxy — galaxy
- Triangulum Galaxy — galaxy
- Whirlpool Galaxy — galaxy
- Sombrero Galaxy — galaxy
- Messier 110 — galaxy