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HD 156091

From Wikipedia, the free encyclopedia
Double star in the constellation Ara
HD 156091
Observation data
Epoch J2000      Equinox J2000
ConstellationAra[1]
Right ascension17h 19m 12.50730s[2]
Declination−59° 41′ 40.5989″[2]
Apparent magnitude (V)5.91[3](5.91 + 13.00)[4]
Characteristics
Spectral typeK2 IIICNIB/II[5]
B−Vcolor index1.37[3]
Astrometry
Radial velocity (Rv)−5.0±0.4[6] km/s
Proper motion (μ)RA: −3.15[2]mas/yr
Dec.: −8.05[2]mas/yr
Parallax (π)1.31±0.36 mas[2]
Distanceapprox. 2,500 ly
(approx. 800 pc)
Absolute magnitude (MV)−0.11[7]
Details
Mass8.4±1.0[8] M☉
Luminosity4,266[9] L☉
Temperature4,306[9] K
Age33.7±8.6[8] Myr
Other designations
CD−59°6506,HD 156091,HIP 84731,HR 6408,SAO 244613
Database references
SIMBADdata

HD 156091 is adouble star in the southernconstellation ofAra. The primary is a sixth magnitudegiant star with stronger than normallines of carbon, nitrogen, and barium in its spectrum.[10] The companion is a 13th magnitude star at anangular separation of 27.4″ along aposition angle of 275°, as of 2000.[4]

References

[edit]
  1. ^Roman, Nancy G. (1987)."Identification of a constellation from a position".Publications of the Astronomical Society of the Pacific.99 (617): 695.Bibcode:1987PASP...99..695R.doi:10.1086/132034. Constellation record for this object atVizieR.
  2. ^abcdevan Leeuwen, F. (2007), "Validation of the new Hipparcos reduction",Astronomy and Astrophysics,474 (2):653–664,arXiv:0708.1752,Bibcode:2007A&A...474..653V,doi:10.1051/0004-6361:20078357,S2CID 18759600.
  3. ^abCorben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars",Monthly Notes of the Astronomical Society of Southern Africa,27: 11,Bibcode:1968MNSSA..27...11C.
  4. ^abMason, B. D.; et al. (2014),"The Washington Visual Double Star Catalog",The Astronomical Journal,122 (6): 3466,Bibcode:2001AJ....122.3466M,doi:10.1086/323920, retrieved2015-07-22
  5. ^Houk, Nancy; Cowley, A. P. (1979),Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan,Bibcode:1978mcts.book.....H.
  6. ^Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system".Astronomy Letters.32 (11):759–771.arXiv:1606.08053.Bibcode:2006AstL...32..759G.doi:10.1134/S1063773706110065.S2CID 119231169.
  7. ^Gontcharov, G. A. (2011). "The red giant branch in the Tycho-2 catalogue".Astronomy Letters.37 (10): 707.arXiv:1607.00557.Bibcode:2011AstL...37..707G.doi:10.1134/S1063773711090040.
  8. ^abTetzlaff, N.; et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun",Monthly Notices of the Royal Astronomical Society,410 (1):190–200,arXiv:1007.4883,Bibcode:2011MNRAS.410..190T,doi:10.1111/j.1365-2966.2010.17434.x,S2CID 118629873.
  9. ^abMcDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars",Monthly Notices of the Royal Astronomical Society,427 (1):343–57,arXiv:1208.2037,Bibcode:2012MNRAS.427..343M,doi:10.1111/j.1365-2966.2012.21873.x,S2CID 118665352.
  10. ^Keenan, Philip C.; Yorka, Sandra B.; Wilson, Olin C. (July 1987), "Recognition and classification of strong-CN giants",Publications of the Astronomical Society of the Pacific,99:629–636,Bibcode:1987PASP...99..629K,doi:10.1086/132025.

External links

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