NGC 6383 is anopen cluster of stars in theconstellation ofScorpius. It was discovered by English astronomerJohn Herschel in 1847. In theNew General Catalogue it was also identified as NGC 6374, most likely due to a clerical error.[5] This is a large cluster of scattered stars that spans anangular diameter of20′. The brightest component is theO-typebinary star system designatedHD 159176 (HR 4962). Against the glare of this sixthmagnitude star, a handful of fainter members are visible with a pair of large binoculars.[3]
The cluster NGC 6383 is located at a distance of approximately 3,540light-years (1,086 pc) from theSun.[2] It forms part of theMilky Way galaxy'sCarina–Sagittarius Arm in astar forming region identified asSh 2-012,[6] and lies in front of a dust absorption cloud. The cluster is likely part of the Sagittarius OB1 association, as are the clustersNGC 6530 andNGC 6531. This cluster, and in particular the ionizing radiation from the star HD 159176, form theH II region RCW 132, which span a crescent-shaped volume that has an angular size of110′ × 80′.[5]
This is a young cluster with age estimates ranging from 4 to 20 million years, and has not yet achieved dynamicrelaxation. It has 254 members identified, with 53 formingyoung stellar objects,[6] and 21 being hot, massiveOB stars. 76 secondaryX-ray sources have been detected, with most of them concentrated near the core.[5] Newly-formed stars range in age from 1–6 million years old, indicating recentstar formation activity. The cluster has a compactcore radius of1.94′±0.19′ and atidal radius of40.7′±14.4′.[6]
^abcRauw, G.; De Becker, M. (December 2008), Reipurth, Bo (ed.), "The Multiwavelength Picture of Star Formation in the Very Young Open Cluster NGC 6383",Handbook of Star Forming Regions, volume II, The Southern Sky ASP Monograph Publications, vol. 5, p. 497,arXiv:0808.3887,Bibcode:2008hsf2.book..497R.
^abcPulgar-Escobar, L. M.; et al. (May 2024), "Characterizing NGC 6383: A study of pre-main sequence stars, mass segregation, and age using Gaia DR3 and 2MASS",arXiv:2405.09145 [astro-ph.SR]
Aidelman, Y.; et al. (February 2018), "Open clusters. III. Fundamental parameters of B stars in NGC 6087, NGC 6250, NGC 6383, and NGC 6530 B-type stars with circumstellar envelopes",Astronomy & Astrophysics,610, id. A30,arXiv:1711.01311,Bibcode:2018A&A...610A..30A,doi:10.1051/0004-6361/201730995.
Qian, S. -B.; et al. (November 2006), "Orbital period investigations of two short-period early-type overcontact binaries BH Cen and V701 Sco in two extremely young galactic clusters IC 2944 and NGC 6383",New Astronomy,12 (2):117–123,Bibcode:2006NewA...12..117Q,doi:10.1016/j.newast.2006.07.003.
van den Ancker, M. E.; et al. (October 2000), "The central part of the young open cluster NGC 6383",Astronomy and Astrophysics,362:580–584,arXiv:astro-ph/0006283,Bibcode:2000A&A...362..580V.
