NGC 6871

NGC 6871 is a small, young open cluster in the constellation of Cygnus. The cluster has fewer than 50 members, most of which are blue and white stars. It is located 5135 light-years from Earth.

Map showing location of NGC 6871

NGC 6871
NGC 6871, taken from Stellarium
Observation data (J2000 epoch)
Right ascension	20h 05m 59s[1]
Declination	+35° 46.6′[1]
Distance	5133 ly (1574 pc[2])
Apparent magnitude (V)	5.2[3]
Physical characteristics
Estimated age	9.1 million years
Presence of eclipsing binary stars [4]
Other designations	GC 4548, h 2067, Struve 2630[3]
Associations
Constellation	Cygnus
See also: Open cluster, List of open clusters

NGC 6871 was born in the same giant molecular cloud with at least six other open clusters. The other open clusters are not gravitationally associated with NGC 6871. NGC 6871 itself also seems to be disintegrating.^[5]

Prominent stars

Star name	Effective temperature	Absolute magnitude	Bolometric magnitude	Mass (M☉)	Spectral type	Ref.
HD 190864	39900	-5.5	-9.3	45	O7III	[6]
HD 226868	33000	-6.4	-9.6	40	O9.7I	[6]
HD 227018	41000	-4.9	-8.8	38	O7V	[6]
HD 191201	31600	-5.8	-8.9	35	B0V	[6]
WR 133 A	70800	-3.4	-8.81	9.3	WN5o	[6][7]
ADS 13374 B (Companion to WR 133 A, also WR 133 B)	30000	-5.4	-8.49	22.6	O9.5I	[6][7]
HD 227634	29500	-5.3	-8.2	25	B0.2III	[6]
HD 190919	26300	-5.8	-8.3	25	B1Ib	[6]
BD+35 3955	26300	-5.7	-8.3	24	B1Ib	[6]