NGC 6193
NGC 6193 and the nebula NGC 6188
Observation data (J2000 epoch)
Right ascension16h 41m 20s
Declination−48° 45′ 48″
Distance3765.3 ly (1155 pc)
Apparent magnitude (V)5.2
Apparent dimensions (V)15′
Physical characteristics
Estimated age3 million years
Other designationsC 1637-486, Cl VDBH 195, OCl 975, Dun 413, Cr 310, ESO 226-SC020, Lund 716, h 3642, GC 4225, Caldwell 82
Associations
ConstellationAra

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.

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]NameRight ascensionDeclinationmVSpectral typeComment
56HD 15013616h 41m 20.4149s−48° 45′ 46.644″5.62O3−3.5 V + O5.5−6 V + O6.5−7 V[3]Triple system
55HD 15013516h 41m 19.4537s−48° 45′ 47.585″6.89O6.5V((f))z[4]Binary[5]
45HD 15004116h 40m 44.5820s−48° 45′ 22.214″7.06B0IIIVariable[6]
37HD 14983416h 39m 30.6704s−48° 51′ 02.511″9.17B2VBinary?[6]
59CD-48 1108016h 41m 36.3084s−48° 47′ 14.904″10.32B4V[6]
CD-48 1107716h 41m 34.91s−48° 46′ 24.2″10.42B2.5V[6]
58CD-48 1107516h 41m 33.21s−48° 45′ 06.6″10.05[7]B2.5V[5]
54CD-48 1107116h 41m 25.8569s−48° 45′ 14.265″8.45B1VBinary[6]
53CD-48 1106916h 41m 22.10s−48° 44′ 57″9.55B1V[6]
40CD-48 1103916h 40m 00.752s−48° 47′ 02.41″11.02[8]B3V[5]
42CD-48 1104616h 40m 20.94s−48° 54′ 56.2″10.91[8]B2.5V[5]
43CD-48 1105116h 40m 33.8837s−48° 53′ 16.19″10.39B1h[6]
CD-48 1106016h 40m 43s−48° 48.8′10.71B3V[6]
47CD-48 1106116h 40m 53.26s−48° 45′ 35.2″11.21[8]B3.5V[5]binary[5]
50CD-48 1106216h 41m 02.49s−48° 53′ 49.7″11.42[7]B3.5V[5]
52CD-48 1106516h 41m 08.48s−48° 52′ 21.6″11.06[7]B2.5V[5]Wrongly cross-referenced to HD 150136 in Herbst[8]
57CD-48 1107616h 41m 33.0589s−48° 33′ 59.651″10.10B2V[6]
63CD-48 1108216h 41m 6.3148s−48° 47′ 41.527″10.38B2V[6]
65CD-48 1108616h 41m 54.83s−48° 45′ 22.8″10.38B2.5V[6]
66CD-48 1108816h 42m 00.47s−48° 42′ 32.5″10.05B2.5V[6]
67CD-48 1109016h 42m 05.69s−48° 42′ 56.8″10.59B2.5V[6]

References

  1. ↑ Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8.
  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. S2CID 41993530.
  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 (1): 10. arXiv:1312.6222. Bibcode:2014ApJS..211...10S. doi:10.1088/0067-0049/211/1/10. S2CID 118847528.
  5. 1 2 3 4 5 6 7 8 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.
  6. 1 2 3 4 5 6 7 8 9 10 11 12 13 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. 1 2 3 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. 1 2 3 4 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.
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