NGC 6193

NGC 6193 (also known as Caldwell 82) is open cluster containing 27 stars in the constellation Ara, visible to the unaided eye.[1] NGC 6193 lies at the center of the Ara OB1 association, which extends over a square degree. The cluster is associated with (and provides the energizing radiation for) neighboring regions of the nebulosity NGC 6188.

NGC 6193
NGC 6193 and the nebula NGC 6188
Observation data (J2000 epoch)
Constellation	Ara
Right ascension	16^h 41^m 20^s
Declination	−48° 45′ 48″
Distance	3765.3 ly (1155 pc)
Apparent magnitude (V)	5.2
Apparent dimensions (V)	15′
Physical characteristics
Estimated age	3 million years
Other designations	C 1637-486, Cl VDBH 195, OCl 975, Dun 413, Cr 310, ESO 226-SC020, Lund 716, h 3642, GC 4225, Caldwell 82

Cluster members

NGC 6193 is dominated by two O class multiple star systems within 10" of each other at the centre of the cluster, and a probable binary B0 giant. There are at least 20 other early B stars in the cluster, of 9th and 10th magnitude.

#[2]	Name	Right ascension	Declination	mV	Spectral type	Comment
56	HD 150136	16^h 41^m 20.4149^s	−48° 45′ 46.644″	5.62	O3−3.5 V + O5.5−6 V + O6.5−7 V[3]	Triple system
55	HD 150135	16^h 41^m 19.4537^s	−48° 45′ 47.585″	6.89	O6.5V((f))z[4]	Binary[5]
45	HD 150041	16^h 40^m 44.5820^s	−48° 45′ 22.214″	7.06	B0III	Variable[6]
37	HD 149834	16^h 39^m 30.6704^s	−48° 51′ 02.511″	9.17	B2V	Binary?[6]
59	CD-48 11080	16^h 41^m 36.3084^s	−48° 47′ 14.904″	10.32	B4V	[6]
	CD-48 11077	16^h 41^m 34.91^s	−48° 46′ 24.2″	10.42	B2.5V	[6]
58	CD-48 11075	16^h 41^m 33.21^s	−48° 45′ 06.6″	10.05[7]	B2.5V[5]
54	CD-48 11071	16^h 41^m 25.8569^s	−48° 45′ 14.265″	8.45	B1V	Binary[6]
53	CD-48 11069	16^h 41^m 22.10^s	−48° 44′ 57″	9.55	B1V	[6]
40	CD-48 11039	16^h 40^m 00.752^s	−48° 47′ 02.41″	11.02[8]	B3V[5]
42	CD-48 11046	16^h 40^m 20.94^s	−48° 54′ 56.2″	10.91[8]	B2.5V[5]
43	CD-48 11051	16^h 40^m 33.8837^s	−48° 53′ 16.19″	10.39	B1h	[6]
	CD-48 11060	16^h 40^m 43^s	−48° 48.8′	10.71	B3V	[6]
47	CD-48 11061	16^h 40^m 53.26^s	−48° 45′ 35.2″	11.21[8]	B3.5V[5]	binary[5]
50	CD-48 11062	16^h 41^m 02.49^s	−48° 53′ 49.7″	11.42[7]	B3.5V[5]
52	CD-48 11065	16^h 41^m 08.48^s	−48° 52′ 21.6″	11.06[7]	B2.5V[5]	Wrongly cross-referenced to HD 150136 in Herbst[8]
57	CD-48 11076	16^h 41^m 33.0589^s	−48° 33′ 59.651″	10.10	B2V	[6]
63	CD-48 11082	16^h 41^m 6.3148^s	−48° 47′ 41.527″	10.38	B2V	[6]
65	CD-48 11086	16^h 41^m 54.83^s	−48° 45′ 22.8″	10.38	B2.5V	[6]
66	CD-48 11088	16^h 42^m 00.47^s	−48° 42′ 32.5″	10.05	B2.5V	[6]
67	CD-48 11090	16^h 42^m 05.69^s	−48° 42′ 56.8″	10.59	B2.5V	[6]

Image gallery

• 
  Star cluster NGC 6193 and nebula NGC 6188.[9]
• 
  Map showing the location of NGC 6193.

References

1. Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8.
9. "Star cluster NGC 6193 and nebula NGC 6188". Retrieved 18 June 2015.

External links

• NGC 6193 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• Universität Wien: Plot of stars in NGC 6193 (WEBDA)
• Universität Wien: IDs of stars in NGC 6193 (WEBDA)
• Encyclopedia of Science: Entry for NGC 6193
• "NGC 6193". SIMBAD. Centre de données astronomiques de Strasbourg.
• "HD 150136". SIMBAD. Centre de données astronomiques de Strasbourg.
• Aladin: Image of NGC 6193, centered on HD 150136