Caldwell 105
Star cluster in Musca · 20,000 light-years
🔭 Explore Caldwell 105 in the 3D map →View Caldwell 105 images →| Type | Star cluster |
|---|---|
| Constellation | Musca |
| Right ascension | 12h 59m 35s |
| Declination | −70° 52′ |
| Object distance | 20,000 light-years |
| Apparent magnitude | 7.8 |
| Apparent size | 8.4′ (arc-minutes) |
| Approx. true diameter | 48.9 light-years across |
| Also known as | C105 · NGC 4833 |
Caldwell 105 is a star cluster (NGC 4833) in Musca — a family of stars bound by gravity. It appears as number 105 in the Caldwell catalogue, Sir Patrick Moore's 1995 list of 109 bright deep-sky objects for amateur astronomers. It spans roughly 8.4 arc-minutes on the sky. At about magnitude 7.8, it is a rewarding binocular and small-telescope target.
Although it appears about 8.4′ wide on the sky, its real span is roughly 48.9 light-years — the difference is a measure of how far away it lies.
Observing Caldwell 105
Caldwell 105 lies in the constellation Musca and is best placed in the evening sky around April. Its maximum altitude above the horizon depends on your latitude. It sits far enough south to be circumpolar from mid-southern latitudes, and never rises for most of the northern hemisphere. It is a comfortable target for binoculars and small telescopes.
See Caldwell 105 in Universe Finder
Open the interactive 3D map to fly to Caldwell 105 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