NGC 6834
Open cluster in the constellation Cygnus
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NGC 6834 is a young[6] open cluster of stars located about 10,850[2] light years from the Sun in the constellation Cygnus. It was discovered on July 17, 1784, by Anglo-German astronomer William Herschel.[7] The cluster has a visual magnitude of 7.8, which is dimmed by 2.1 magnitudes due to interstellar dust.[3] Half the cluster members lie within an angular radius of 6′.[2]
| NGC 6834 | |
|---|---|
| |
| Observation data (J2000.0 epoch) | |
| Right ascension | 19h 52m 12.5s[1] |
| Declination | +29° 24′ 29″[1] |
| Distance | 10,850 ly (3,326.7 pc)[2] |
| Apparent magnitude (V) | 7.8[3] |
| Apparent dimensions (V) | 12′[2] |
| Physical characteristics | |
| Radius | 6.1 ly |
| Estimated age | 65±18 Myr[4] |
| Other designations | NGC 6834, C 1950+292[5] |
| Associations | |
| Constellation | Cygnus |
The Trumpler class of this cluster is II 2 m, indicating it is medium-rich in stars (m) with a moderate brightness range (2) and little central concentration of the stars (II).[6] It has about 260 members[2] and an age of approximately 65 million years,[4] although estimates range from 50 to 80 million.[6] A total of fifteen B-type variable stars have been detected in the cluster with four Be stars. Five of the cluster members show hydrogen alpha emission, including a γ Cas and two λ Eri variables.[6]
