15 Sagittarii

Star in the constellation Sagittarius 15 Sagittarii J2000 Sagittarius 18 15 12.90641 -20 43 41.7738 5.37 O9.7 Iab or B0 Iab 0.007 0.004 −6.3 2.8 +1.60 −1.51 0.10 0.45 4200 650 commas 1,300 200 commas 15 Sgr Aa ~30 28.6 12.5 4.47 3.85 2.07 5 commas 3.10 28000 1000 commas 83 7 15 Sgr -20° 5054 167264 89439 6822 186543 J18152-2044 15+Sgr 15 Sagittarii is a blue-hued binary star system in the southern zodiac constellation of Sagittarius. The estimated distance based upon photometry is around 1,300 pc ly flip on. It is faintly visible to the naked eye with an apparent visual magnitude of 5.37. The system is moving closer to the Sun with a heliocentric radial velocity of around −6 km/s. Chini et al. (2012) identify this as a double-lined spectroscopic binary star system. It shows a stellar classification of O9.7 Iab, matching a massive O-type supergiant star. Along with the O-type star 16 Sgr (HD 167263), it is ionizing an H II region along the western edge of the molecular cloud L291. The Washington Double Star Catalog lists four companions within a 2 arcsecond angular radius. References 15 Sgr 2018-03-15 Validation of the new Hipparcos reduction van Leeuwen F. . Astronomy and Astrophysics 474 2 653–664 2007 0708.1752 2007A&A...474..653V 10.1051/0004-6361:20078357 18759600 XHIP: An extended hipparcos compilation Anderson E. Francis Ch. Astronomy Letters 38 5 331 2012 2012AstL...38..331A 10.1134/S1063773712050015 1108.4971 119257644 . Gontcharov G. A. Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system Astronomy Letters 32 11 759–771 November 2006 10.1134/S1063773706110065 2006AstL...32..759G . 1606.08053 119231169 Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants Fraser M. Dufton P. L. Hunter I. Ryans R. S. I. Monthly Notices of the Royal Astronomical Society 404 3 1306−1320 May 2010 10.1111/j.1365-2966.2010.16392.x free 2010MNRAS.404.1306F 1001.3337 118674151 HH 80-81: A Highly Collimated Herbig-Haro Complex Powered by a Massive Young Star 1 Marti J. Rodriguez L. F. Reipurth B. Astrophysical Journal 416 208 October 1993 10.1086/173227 1993ApJ...416..208M free . Further optical and UV spectroscopy of stars in the direction of the Riegel & Crutcher cold cloud 1 Kemp S. N. Bates B. Hambly N. C. Monthly Notices of the Royal Astronomical Society 283 3 1089–1101 December 1996 10.1093/mnras/283.3.1089 1996MNRAS.283.1089K free A spectroscopic survey on the multiplicity of high-mass stars 1 Chini R. Hoffmeister V. H. Nasseri A. Stahl O. Zinnecker H. Monthly Notices of the Royal Astronomical Society 424 3 1925–1929 August 2012 10.1111/j.1365-2966.2012.21317.x free 2012MNRAS.424.1925C 1205.5238 119120749 . Southern Massive Stars at High Angular Resolution: Observational Campaign and Companion Detection 1 Sana H. Le Bouquin J. -B. Lacour S. Berger J. -P. Duvert G. Gauchet L. Norris B. Olofsson J. Pickel D. Zins G. Absil O. de Koter A. Kratter K. Schnurr O. Zinnecker H. The Astrophysical Journal Supplement Series 215 1 15 35 November 2014 10.1088/0067-0049/215/1/15 2014ApJS..215...15S 1409.6304 53500788 Radial dependence of line profile variability in seven O9-B0.5 stars 1 Martins F. Marcolino W. Hillier D. J. Donati J. -F. Bouret J. -C. Astronomy & Astrophysics 574 A142 38 February 2015 10.1051/0004-6361/201423882 2015A&A...574A.142M 1409.5057 118365203 . The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars The Astrophysical Journal Supplement 211 10 2014 Sota A. Maíz Apellániz J. Morrell N. I. Nidia Morrell Barbá R. H. Walborn N. R. Gamen R. C. Arias J. I. Alfaro E. J. 1 2014ApJS..211...10S 10.1088/0067-0049/211/1/10 1312.6222 118847528 VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system CDS/ADC Collection of Electronic Catalogues Ducati J. R. 2237 2002 2002yCat.2237....0D Category:O-type supergiants Category:Spectroscopic binaries Category:Sagittarius (constellation) Category:Durchmusterung objects Sagittarii, 15 167264 089439 6822