NGC 6193

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

NGC 6193 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.

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

{{cite journal|bibcode=1973A&AS...10..135M|title=Southern open stars clusters. III. UBV-Hbeta photometry of 28 clusters between galactic longitudes 297d and 353d|journal=Astronomy and Astrophysics Supplement Series|volume=10|pages=135|author1=Moffat|first1=A. F. J.|last2=Vogt|first2=N.|year=1973}}</ref>

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1. Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 0-00-717223-0.
2. Whiteoak, J. B.; Rodgers, A. W. (1963). "An association of O and B stars in Ara". Monthly Notices of the Royal Astronomical Society. 125 (2): 105. Bibcode:1963MNRAS.125..105W. doi:10.1093/mnras/125.2.105.
3. Sana, H.; Le Bouquin, J.-B.; Mahy, L.; Absil, O.; De Becker, M.; Gosset, E. (2013). "Three-dimensional orbits of the triple-O stellar system HD 150136". Astronomy & Astrophysics. 553: A131. arXiv:1304.3457. Bibcode:2013A&A...553A.131S. doi:10.1051/0004-6361/201321189.
4. Sota, A.; Maíz Apellániz, J.; Morrell, N. I.; Barbá, R. H.; Walborn, N. R.; Gamen, R. C.; Arias, J. I.; Alfaro, E. J. (2014). "The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars". The Astrophysical Journal Supplement. 211: 10. arXiv:1312.6222. Bibcode:2014ApJS..211...10S. doi:10.1088/0067-0049/211/1/10.
5. Huang, W.; Gies, D. R. (2006). "Stellar Rotation in Young Clusters. I. Evolution of Projected Rotational Velocity Distributions". The Astrophysical Journal. 648: 580. arXiv:astro-ph/0510450. Bibcode:2006ApJ...648..580H. doi:10.1086/505782.
6. Arnal, Marcelo; Morrell, Nidia; Garcia, Beatriz; Levato, Hugo (1988). "The open cluster NGC 6193 - Another cluster rich in spectroscopic binaries". Astronomical Society of the Pacific. 100: 1076. Bibcode:1988PASP..100.1076A. doi:10.1086/132273.
7. Vazquez, R. A.; Feinstein, A. (1992). "Binary stars - Another effect contributing to the supposed abnormal extinction law in NGC 6193?". Astronomy and Astrophysics Supplement Series. 92: 863. Bibcode:1992A&AS...92..863V.
8. Herbst, W.; Havlen, R. J. (1977). "ARA OB1, NGC 6193 and ARA R1 - an optical study of a very young southern complex". Astronomy and Astrophysics Supplement Series. 30: 279. Bibcode:1977A&AS...30..279H.
9. "Star cluster NGC 6193 and nebula NGC 6188". Retrieved 18 June 2015.
10. Moffat, A. F. J.; Vogt, N. (1973). "Southern open stars clusters. III. UBV-Hbeta photometry of 28 clusters between galactic longitudes 297d and 353d". Astronomy and Astrophysics Supplement Series. 10: 135. Bibcode:1973A&AS...10..135M.

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
• Simbad: Entry for NGC 6193
• Simbad: Entry for NGC 6193 1 (HD 150136)
• Aladin: Image of NGC 6193, centered on HD 150136