HD 156331

HD 156331
Observation data; Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17h 19m 30.51713s
Declination	−50° 03′ 49.5490″
Apparent magnitude (V)	6.27 (7.0 + 7.0)
Characteristics
Spectral type	F8III + B9V
B−V color index	+0.41
Astrometry
Radial velocity (Rv)	+10.50±1.2 km/s
Proper motion (μ)	RA: +8.76 mas/yr ; Dec.: −32.86 mas/yr
Parallax (π)	16.94 ± 0.51 mas
Distance	193 ± 6 ly ; (59 ± 2 pc)
Details
HD 156331 A
Mass	1.56 M☉
Luminosity	8.6 L☉
Surface gravity (log g)	3.46 cgs
Temperature	6597 K
Metallicity [Fe/H]	−0.02 dex
Age	1.80 Gyr
Other designations
	CD-49° 11324, HD 156331, HIP 84759, HR 6423, SAO 244631.
Database references
SIMBAD	data

HD 156331 is double star in the southern constellation of Ara. As of 2014, the pair have an angular separation of less than an arc second along a position angle of 49°.^[3]

References

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 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.
^ ^2.0 ^2.1 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
^ ^3.0 ^3.1 ^3.2 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
^ 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.
^ ^5.0 ^5.1 ^5.2 ^5.3 Casagrande, L.; et al. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy & Astrophysics. 530 (A138): 21. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. S2CID 56118016.
^ ^6.0 ^6.1 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

External links

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[van_Leeuwen2007-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 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] 2.0 ^2.1 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] 3.0 ^3.1 ^3.2 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

[Gontcharov-4] 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.

[aa530_A138-5] 5.0 ^5.1 ^5.2 ^5.3 Casagrande, L.; et al. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy & Astrophysics. 530 (A138): 21. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. S2CID 56118016.

[Mcdonald2012-6] 6.0 ^6.1 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

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Observation data Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17^h 19^m 30.51713^s^[1]
Declination	−50° 03′ 49.5490″^[1]
Apparent magnitude (V)	6.27^[2] (7.0 + 7.0)^[3]
Characteristics
Spectral type	F8III + B9V^[3]
B−V color index	+0.41^[2]
Astrometry

Radial velocity (R_v)	+10.50±1.2^[4] km/s
Proper motion (μ)	RA: +8.76^[1] mas/yr Dec.: −32.86^[1] mas/yr
Parallax (π)	16.94 ± 0.51 mas^[1]
Distance	193 ± 6 ly (59 ± 2 pc)

Details
HD 156331 A
Mass	1.56^[5] `M`_☉
Luminosity	8.6^[6] `L`_☉
Surface gravity (log g)	3.46^[5] cgs
Temperature	6597^[6] K
Metallicity [Fe/H]	−0.02^[5] dex
Age	1.80^[5] Gyr

Other designations
CD-49° 11324, HD 156331, HIP 84759, HR 6423, SAO 244631.
Database references
SIMBAD	data