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)
ConstellationAra
Right ascension 16h 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

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 150136 16h 41m 20.4149s−48° 45′ 46.644″5.62O3−3.5 V + O5.5−6 V + O6.5−7 V[3]Triple system
55HD 150135 16h 41m 19.4537s−48° 45′ 47.585″6.89O6.5V((f))z[4]Binary[5]
45HD 150041 16h 40m 44.5820s−48° 45′ 22.214″7.06B0IIIVariable[6]
37HD 149834 16h 39m 30.6704s−48° 51′ 02.511″9.17B2VBinary?[6]
59CD-48 11080 16h 41m 36.3084s−48° 47′ 14.904″10.32B4V[6]
CD-48 11077 16h 41m 34.91s−48° 46′ 24.2″10.42B2.5V[6]
58CD-48 11075 16h 41m 33.21s−48° 45′ 06.6″10.05[7]B2.5V[5]
54CD-48 11071 16h 41m 25.8569s−48° 45′ 14.265″8.45B1VBinary[6]
53CD-48 11069 16h 41m 22.10s−48° 44′ 57″9.55B1V[6]
40CD-48 11039 16h 40m 00.752s−48° 47′ 02.41″11.02[8]B3V[5]
42CD-48 11046 16h 40m 20.94s−48° 54′ 56.2″10.91[8]B2.5V[5]
43CD-48 11051 16h 40m 33.8837s−48° 53′ 16.19″10.39B1h[6]
CD-48 11060 16h 40m 43s−48° 48.8′10.71B3V[6]
47CD-48 11061 16h 40m 53.26s−48° 45′ 35.2″11.21[8]B3.5V[5]binary[5]
50CD-48 11062 16h 41m 02.49s−48° 53′ 49.7″11.42[7]B3.5V[5]
52CD-48 11065 16h 41m 08.48s−48° 52′ 21.6″11.06[7]B2.5V[5]Wrongly cross-referenced to HD 150136 in Herbst[8]
57CD-48 11076 16h 41m 33.0589s−48° 33′ 59.651″10.10B2V[6]
63CD-48 11082 16h 41m 6.3148s−48° 47′ 41.527″10.38B2V[6]
65CD-48 11086 16h 41m 54.83s−48° 45′ 22.8″10.38B2.5V[6]
66CD-48 11088 16h 42m 00.47s−48° 42′ 32.5″10.05B2.5V[6]
67CD-48 11090 16h 42m 05.69s−48° 42′ 56.8″10.59B2.5V[6]
  • 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.


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