NGC 6834

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
See also: Open cluster, List of open clusters

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]