Caldwell 28
Star cluster in Andromeda · 1,300 light-years
🔭 Explore Caldwell 28 in the 3D map →View Caldwell 28 images →| Type | Star cluster |
|---|---|
| Constellation | Andromeda |
| Right ascension | 1h 57m 35s |
| Declination | +37° 50′ |
| Object distance | 1,300 light-years |
| Apparent magnitude | 5.7 |
| Apparent size | 39′ (arc-minutes) |
| Approx. true diameter | 14.7 light-years across |
| Also known as | C28 · NGC 752 |
Caldwell 28 is a star cluster (NGC 752) in Andromeda — a family of stars bound by gravity. It appears as number 28 in the Caldwell catalogue, Sir Patrick Moore's 1995 list of 109 bright deep-sky objects for amateur astronomers. It spans roughly 39 arc-minutes on the sky. At about magnitude 5.7, it is a rewarding binocular and small-telescope target.
Although it appears about 39′ wide on the sky, its real span is roughly 14.7 light-years — the difference is a measure of how far away it lies.
Observing Caldwell 28
Caldwell 28 lies in the constellation Andromeda and is best placed in the evening sky around October. Its maximum altitude above the horizon depends on your latitude. It is best placed for observers in the northern hemisphere, and sits low for those far south. It is a comfortable target for binoculars and small telescopes.
See Caldwell 28 in Universe Finder
Open the interactive 3D map to fly to Caldwell 28 and see it in context among the real stars around it. Launch the 3D view →
Sources
- Position, magnitude and angular size from the OpenNGC catalogue (Mattia Verga).
- Object identity cross-referenced with SIMBAD (CDS, Strasbourg).
- Image credits and the original observation source are linked with each photograph.
Related objects
- Pleiades — star cluster
- Hercules Cluster — star cluster
- Small Sgr Star Cloud — star cluster
- Messier 25 — star cluster
- Messier 103 — star cluster