HD 156279

HD 156279
Observation data; Epoch J2000 Equinox J2000
Constellation	Draco
Right ascension	17h 12m 23.204816s[1]
Declination	+63° 21′ 07.531205″[1]
Apparent magnitude (V)	8.167[2]
Characteristics
Evolutionary stage	main-sequence star
Spectral type	K0
Apparent magnitude (R)	7.6
Apparent magnitude (G)	7.8657
Apparent magnitude (J)	6.677
B−V color index	0.80[3]
Astrometry
Radial velocity (Rv)	−21.05±0.17[1] km/s
Proper motion (μ)	RA: −1.879±0.024 mas/yr[1] ; Dec.: 160.429±0.027 mas/yr[1]
Parallax (π)	27.6756 ± 0.0200 mas[1]
Distance	117.85 ± 0.09 ly ; (36.13 ± 0.03 pc)
Details
Mass	0.93[4] M☉
Radius	0.95[5] R☉
Luminosity	0.81 L☉
Temperature	5453[5] K
Metallicity [Fe/H]	0.14±0.01[2] dex
Age	4[4] Gyr
Other designations
	BD+63 1335, Gaia DR2 1631084478574318976, HIP 84171, SAO 17390, TYC 4202-656-1, 2MASS J17122319+6321074[5][6]
Database references
SIMBAD	data

HD 156279 is a type K0 star, located 36.1 parsecs (118 ly) away from Earth. It has various alternate designations, including HIP 84171 and BD+63 1335. It is presumed to be a single star, as in 2019 all imaging surveys have failed to find any stellar companions.[2]

Characteristics

HD 156279 has a stellar mass of 0.93 M_☉ and a stellar radius of 0.95 R_☉. It has a metallicity of 0.14 and an effective temperature of 5453 Kelvin. HD 156279 is 4 billion years old and based on the spectral type, K0, it is an orange colour.[5] HD 156279 has an apparent magnitude of 8.167[2] and an absolute magnitude of 5.27.[7][8] The star is slightly enriched in heavy elements, having 140% of the solar abundance.[2]

Planetary system

Orbiting HD 156279 are two superjovian planets, the inner HD 156279 b (discovered in 2011)[7] and outer HD 156279 c (discovered in 2016).[3] In 2022, the inclination and true mass of HD 156279 c were measured via astrometry.[9]

The HD 156279 planetary system[5][9]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥9.50+0.31 −0.32 M_J	0.5041+0.0082 −0.0085	133.4031+0.0037 −0.0040	0.64779+0.00068 −0.00066	—	1.11 R_J
c	9.750+1.319 −0.605 M_J	5.486+0.219 −0.240	4818.3+44.5 −43.1	0.261±0.006	74.699+36.999 −10.533°	0.9 R_J

References

Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
Biller, B.; Mužić, K.; Lopez, E.; Bonavita, M.; Rice, K.; Fontanive, C.; Biller, B. (2019), "A high binary fraction for the most massive close-in giant planets and brown dwarf desert members", Monthly Notices of the Royal Astronomical Society, 485 (4): 4967–4996, arXiv:1903.02332, Bibcode:2019MNRAS.485.4967F, doi:10.1093/mnras/stz671, S2CID 84180618
Bryan, Marta L.; Knutson, Heather A.; Howard, Andrew W.; Ngo, Henry; Batygin, Konstantin; Crepp, Justin R.; Fulton, B. J.; Hinkley, Sasha; Isaacson, Howard; Johnson, John A.; Marcy, Geoffry W.; Wright, Jason T. (2016), "Statistics of long period gas giant planets in known planetary systems", The Astrophysical Journal, 821 (2): 89, arXiv:1601.07595, Bibcode:2016ApJ...821...89B, doi:10.3847/0004-637X/821/2/89, S2CID 19709252
openexoplanetcatalogue.com
NASA archive
"HD 156276". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 October 2020.
Díaz, Rodrigo F.; Santerne, Alexandre; Sahlmann, Johannes; Hébrard, Guillaume; Eggenberger, Anne; Santos, Nuno C.; Moutou, Claire; Arnold, Luc; Boisse, Isabelle; Bonfils, Xavier; Bouchy, François; Delfosse, Xavier; Desort, Morgan; Ehrenreich, David; Forveille, Thierry; Lagrange, Anne-Marie; Lovis, Christophe; Pepe, Francesco; Perrier, Christian; Queloz, Didier; Ségransan, Damien; Udry, Stéphane; Vidal-Madjar, Alfred (2012), "The SOPHIE search for northern extrasolar planets IV. Massive companions in the planet-brown dwarf boundary", Astronomy & Astrophysics, A113: 538, arXiv:1111.1168, Bibcode:2012A&A...538A.113D, doi:10.1051/0004-6361/201117935, S2CID 55322205
"HD 156279". www.exoplanetkyoto.org. Retrieved 2020-04-15.
Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.

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[GaiaDR3-1] Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.

[Fontanive2019-2] Biller, B.; Mužić, K.; Lopez, E.; Bonavita, M.; Rice, K.; Fontanive, C.; Biller, B. (2019), "A high binary fraction for the most massive close-in giant planets and brown dwarf desert members", Monthly Notices of the Royal Astronomical Society, 485 (4): 4967–4996, arXiv:1903.02332, Bibcode:2019MNRAS.485.4967F, doi:10.1093/mnras/stz671, S2CID 84180618

[Bryan2016-3] Bryan, Marta L.; Knutson, Heather A.; Howard, Andrew W.; Ngo, Henry; Batygin, Konstantin; Crepp, Justin R.; Fulton, B. J.; Hinkley, Sasha; Isaacson, Howard; Johnson, John A.; Marcy, Geoffry W.; Wright, Jason T. (2016), "Statistics of long period gas giant planets in known planetary systems", The Astrophysical Journal, 821 (2): 89, arXiv:1601.07595, Bibcode:2016ApJ...821...89B, doi:10.3847/0004-637X/821/2/89, S2CID 19709252

[oecs-4] xoplanetcatalogue.com

[nasasc-5] NASA archive

[SIMBAD-6] "HD 156276". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 October 2020.

[Diaz2011-7] Díaz, Rodrigo F.; Santerne, Alexandre; Sahlmann, Johannes; Hébrard, Guillaume; Eggenberger, Anne; Santos, Nuno C.; Moutou, Claire; Arnold, Luc; Boisse, Isabelle; Bonfils, Xavier; Bouchy, François; Delfosse, Xavier; Desort, Morgan; Ehrenreich, David; Forveille, Thierry; Lagrange, Anne-Marie; Lovis, Christophe; Pepe, Francesco; Perrier, Christian; Queloz, Didier; Ségransan, Damien; Udry, Stéphane; Vidal-Madjar, Alfred (2012), "The SOPHIE search for northern extrasolar planets IV. Massive companions in the planet-brown dwarf boundary", Astronomy & Astrophysics, A113: 538, arXiv:1111.1168, Bibcode:2012A&A...538A.113D, doi:10.1051/0004-6361/201117935, S2CID 55322205

[8] "HD 156279". www.exoplanetkyoto.org. Retrieved 2020-04-15.

[Feng2022-9] Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.