HD 156091

HD 156091
Observation data; Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17h 19m 12.50730s
Declination	−59° 41′ 40.5989″
Apparent magnitude (V)	5.91 (5.91 + 13.00)
Characteristics
Spectral type	K2 IIICNIB/II
B−V color index	1.37
Astrometry
Radial velocity (Rv)	−5.0±0.4 km/s
Proper motion (μ)	RA: −3.15 mas/yr ; Dec.: −8.05 mas/yr
Parallax (π)	1.31 ± 0.36 mas
Distance	approx. 2,500 ly ; (approx. 800 pc)
Details
Mass	8.4±1.0 M☉
Luminosity	4,266 L☉
Temperature	4,306 K
Age	33.7±8.6 Myr
Other designations
	CD-59° 6506, HD 156091, HIP 84731, HR 6408, SAO 244613.
Database references
SIMBAD	data

HD 156091 is a double star in the southern constellation of Ara. The primary is a sixth magnitude giant star with stronger than normal lines of carbon, nitrogen, and barium in its spectrum.^[8] The companion is a 13th magnitude star at an angular separation of 27.4″ along a position angle of 275°, as of 2000.^[3]

References

^ ^a ^b ^c ^d ^e van 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.
^ ^a ^b Corben, 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.
^ ^a ^b Mason, 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, retrieved 2015-07-22
^ 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.
^ 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.
^ ^a ^b Tetzlaff, 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.
^ ^a ^b McDonald, 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.
^ 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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[van_Leeuwen2007-1] van 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.

[mnrassa27_11-2] Corben, 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.

[WDSC2014-3] Mason, 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, retrieved 2015-07-22

[houk1979-4] 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.

[Gontcharov-5] 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.

[mnras410_1_190-6] Tetzlaff, 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.

[Mcdonald_et_al_2012-7] McDonald, 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.

[pasp99_629-8] 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.

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Observation data Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17^h 19^m 12.50730^s^[1]
Declination	−59° 41′ 40.5989″^[1]
Apparent magnitude (V)	5.91^[2] (5.91 + 13.00)^[3]
Characteristics
Spectral type	K2 IIICNIB/II^[4]
B−V color index	1.37^[2]
Astrometry

Radial velocity (R_v)	−5.0±0.4^[5] km/s
Proper motion (μ)	RA: −3.15^[1] mas/yr Dec.: −8.05^[1] mas/yr
Parallax (π)	1.31 ± 0.36 mas^[1]
Distance	approx. 2,500 ly (approx. 800 pc)

Details

Mass	8.4±1.0^[6] `M`_☉
Luminosity	4,266^[7] `L`_☉
Temperature	4,306^[7] K
Age	33.7±8.6^[6] Myr

Other designations
CD-59° 6506, HD 156091, HIP 84731, HR 6408, SAO 244613.
Database references
SIMBAD	data