Open star cluster in the constellation Ara
NGC 6193 NGC 6193 and the nebula NGC 6188
Observation data (J2000 epoch ) Right ascension 16h 41m 20s Declination −48° 45′ 48″ Distance 3765.3ly (1155pc ) 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 Associations Constellation Ara See also:Open cluster ,List of open clusters
NGC 6193 (also known asCaldwell 82 ) isopen cluster containing 27 stars in theconstellation Ara , visible to the unaided eye.[ 1] NGC 6188 .
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 16h 41m 20.4149s −48° 45′ 46.644″ 5.62 O3−3.5 V + O5.5−6 V + O6.5−7 V[ 3] Triple system 55 HD 150135 16h 41m 19.4537s −48° 45′ 47.585″ 6.89 O6.5V((f))z[ 4] Binary[ 5] 45 HD 150041 16h 40m 44.5820s −48° 45′ 22.214″ 7.06 B0III Variable[ 6] 37 HD 149834 16h 39m 30.6704s −48° 51′ 02.511″ 9.17 B2V Binary?[ 6] 59 CD-48 11080 16h 41m 36.3084s −48° 47′ 14.904″ 10.32 B4V [ 6] CD-48 11077 16h 41m 34.91s −48° 46′ 24.2″ 10.42 B2.5V [ 6] 58 CD-48 11075 16h 41m 33.21s −48° 45′ 06.6″ 10.05[ 7] B2.5V[ 5] 54 CD-48 11071 16h 41m 25.8569s −48° 45′ 14.265″ 8.45 B1V Binary[ 6] 53 CD-48 11069 16h 41m 22.10s −48° 44′ 57″ 9.55 B1V [ 6] 40 CD-48 11039 16h 40m 00.752s −48° 47′ 02.41″ 11.02[ 8] B3V[ 5] 42 CD-48 11046 16h 40m 20.94s −48° 54′ 56.2″ 10.91[ 8] B2.5V[ 5] 43 CD-48 11051 16h 40m 33.8837s −48° 53′ 16.19″ 10.39 B1h [ 6] CD-48 11060 16h 40m 43s −48° 48.8′ 10.71 B3V [ 6] 47 CD-48 11061 16h 40m 53.26s −48° 45′ 35.2″ 11.21[ 8] B3.5V[ 5] binary[ 5] 50 CD-48 11062 16h 41m 02.49s −48° 53′ 49.7″ 11.42[ 7] B3.5V[ 5] 52 CD-48 11065 16h 41m 08.48s −48° 52′ 21.6″ 11.06[ 7] B2.5V[ 5] Wrongly cross-referenced toHD 150136 in Herbst[ 8] 57 CD-48 11076 16h 41m 33.0589s −48° 33′ 59.651″ 10.10 B2V [ 6] 63 CD-48 11082 16h 41m 6.3148s −48° 47′ 41.527″ 10.38 B2V [ 6] 65 CD-48 11086 16h 41m 54.83s −48° 45′ 22.8″ 10.38 B2.5V [ 6] 66 CD-48 11088 16h 42m 00.47s −48° 42′ 32.5″ 10.05 B2.5V [ 6] 67 CD-48 11090 16h 42m 05.69s −48° 42′ 56.8″ 10.59 B2.5V [ 6]
^ Dunlop, Storm (2005).Atlas of the Night Sky Collins .ISBN 978-0-00-717223-8 ^ 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 ^ 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 .S2CID 41993530 . ^ 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 (1): 10.arXiv :1312.6222 Bibcode :2014ApJS..211...10S .doi :10.1088/0067-0049/211/1/10 .S2CID 118847528 . ^a b c d e f g h Huang, W.; Gies, D. R. (2006). "Stellar Rotation in Young Clusters. I. Evolution of Projected Rotational Velocity Distributions".The Astrophysical Journal .648 (1):580– 590.arXiv :astro-ph/0510450 Bibcode :2006ApJ...648..580H .doi :10.1086/505782 .S2CID 13989261 . ^a b c d e f g h i j k l m 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 ^a b c 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 . ^a b c d 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 . ^ "Star cluster NGC 6193 and nebula NGC 6188" . Retrieved18 June 2015 .Wikimedia Commons has media related to
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![Star cluster NGC 6193 and nebula NGC 6188.[9]](/mt/?noimg=&dark=on&url=http%3a%2f%2fen.wikipedia.org%2fwiki%2fFile%3aStar_cluster_NGC_6193_and_nebula_NGC_6188.jpg)
