# HD 156279

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/HD_156279
> Markdown URL: https://mediated.wiki/source/HD_156279.md
> Source: https://en.wikipedia.org/wiki/HD_156279
> Source revision: 1335884026
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

Star in the constellation Draco

HD 156279 Observation data Epoch J2000 Equinox J2000 Constellation Draco[1] Right ascension 17h 12m 23.204816s[2] Declination +63° 21′ 07.531205″[2] Apparent magnitude (V) 8.167±0.013[3] Characteristics Evolutionary stage main-sequence[4] Spectral type K0[3] or G6[4] Apparent magnitude (R) 7.60[1] Apparent magnitude (G) 7.8657[2] Apparent magnitude (J) 6.677±0.018[1] B−V color index 0.801±0.014[1] Astrometry Radial velocity (Rv) −20.144±0.161[5] km/s Proper motion (μ) RA: −1.879±0.024 mas/yr[2] Dec.: 160.429±0.027 mas/yr[2] Parallax (π) 27.6756±0.0200 mas[2] Distance 117.85 ± 0.09 ly (36.13 ± 0.03 pc) Absolute magnitude (MV) 5.25[1] Details Mass 0.999+0.046 −0.045[6] M☉ Radius 0.94±0.02[7] R☉ Luminosity 0.70±0.01[7] L☉ Surface gravity (log g) 4.45±0.03[7] cgs Temperature 5,449±31[7] K Metallicity [Fe/H] 0.14±0.01[3] dex Rotational velocity (v sin i) 2.51±1[4] km/s Age 7.4±2.2[7] Gyr Other designations BD+63 1335, HD 156279, HIP 84171, SAO 17390, PPM 20265, NLTT 44404, TYC 4202-656-1, 2MASS J17122319+6321074, Gaia DR2 1631084478574318976[8] Database references SIMBAD data

**HD 156279** is a [star](/source/Star) with a pair of orbiting [exoplanets](/source/Exoplanets)[9] located in the northern [constellation](/source/Constellation) of [Draco](/source/Draco_(constellation)).[1] It has various alternate designations, including HIP 84171 and BD+63 1335. [Parallax](/source/Stellar_parallax) measurements yield a distance of 118 [light years](/source/Light_year) from the Sun,[2] but it is drifting closer with a [radial velocity](/source/Radial_velocity) of −20 km/s.[5] Despite an [absolute magnitude](/source/Absolute_magnitude) of 5.25,[1] at that distance the star is too faint to be visible to the naked eye with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 8.17.[3] It is presumed to be a single star, as in 2019 all imaging surveys have failed to find any stellar companions.[3]

The [spectrum](/source/Stellar_spectrum) of HD 156279 has a [stellar classification](/source/Stellar_classification) of G6[4] or K0,[3] depending on the study. Hence it presents as an ordinary [main sequence](/source/Main_sequence) star[4] of the [late](/source/Late_type_star) [G-type](/source/G-type_main-sequence_star) or early [K-type](/source/K-type_main-sequence_star). The star has 93% of the mass of the Sun and 94% of the Sun's radius. HD 156279 is roughly seven[7] billion years old and is spinning with a [projected rotational velocity](/source/Projected_rotational_velocity) of 2.5 km/s.[4] Based on the abundance of iron, this star is slightly enriched in heavy elements, having 140% of the solar abundance.[3] It is radiating 70%[7] of the luminosity of the Sun from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 5,449 K.[7]

## Planetary system

Orbiting HD 156279 are two [superjovian](/source/Superjovian) planets, the inner HD 156279 b (discovered in 2011)[4] and outer HD 156279 c (discovered in 2016).[9] In 2022, the inclination and true mass of HD 156279 c were measured for the first time, using the [astrometry](/source/Astrometry) technique.[10]

The HD 156279 planetary system[6] Companion (in order from star) Mass Semimajor axis (AU) Orbital period (years) Eccentricity Inclination (°) Radius b ≥ 9.82±0.29 MJ 0.5126+0.0077 −0.0078 0.365235(10) 0.6479+0.00070 −0.00077 — — c 10.53+0.65 −0.59 MJ 5.570+0.086 −0.084 13.093±0.081 0.2602+0.0047 −0.0048 110.9+6.9 −9.4 —

## References

1. ^ [***a***](#cite_ref-Anderson_Francis_2012_1-0) [***b***](#cite_ref-Anderson_Francis_2012_1-1) [***c***](#cite_ref-Anderson_Francis_2012_1-2) [***d***](#cite_ref-Anderson_Francis_2012_1-3) [***e***](#cite_ref-Anderson_Francis_2012_1-4) [***f***](#cite_ref-Anderson_Francis_2012_1-5) [***g***](#cite_ref-Anderson_Francis_2012_1-6) Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", *Astronomy Letters*, **38** (5): 331, [arXiv](/source/ArXiv_(identifier)):[1108.4971](https://arxiv.org/abs/1108.4971), [Bibcode](/source/Bibcode_(identifier)):[2012AstL...38..331A](https://ui.adsabs.harvard.edu/abs/2012AstL...38..331A), [doi](/source/Doi_(identifier)):[10.1134/S1063773712050015](https://doi.org/10.1134%2FS1063773712050015), [S2CID](/source/S2CID_(identifier)) [119257644](https://api.semanticscholar.org/CorpusID:119257644).

1. ^ [***a***](#cite_ref-GaiaDR3_2-0) [***b***](#cite_ref-GaiaDR3_2-1) [***c***](#cite_ref-GaiaDR3_2-2) [***d***](#cite_ref-GaiaDR3_2-3) [***e***](#cite_ref-GaiaDR3_2-4) [***f***](#cite_ref-GaiaDR3_2-5) Vallenari, A.; et al. (Gaia collaboration) (2023). ["*Gaia* Data Release 3. Summary of the content and survey properties"](https://doi.org/10.1051%2F0004-6361%2F202243940). *Astronomy and Astrophysics*. **674**: A1. [arXiv](/source/ArXiv_(identifier)):[2208.00211](https://arxiv.org/abs/2208.00211). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...674A...1G](https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243940](https://doi.org/10.1051%2F0004-6361%2F202243940). [S2CID](/source/S2CID_(identifier)) [244398875](https://api.semanticscholar.org/CorpusID:244398875). [Gaia DR3 record for this source](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-source=+I%2F355&-from=nav&-nav=cat%3AI%2F355%26tab%3A%7BI%2F355%2Fgaiadr3%7D%26key%3Asource%3D1355%2Fgaiadr3%26HTTPPRM%3A%26-out.add%3D.%26Source%3D%3D%3D1631084478574318976%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-Fontanive2019_3-0) [***b***](#cite_ref-Fontanive2019_3-1) [***c***](#cite_ref-Fontanive2019_3-2) [***d***](#cite_ref-Fontanive2019_3-3) [***e***](#cite_ref-Fontanive2019_3-4) [***f***](#cite_ref-Fontanive2019_3-5) [***g***](#cite_ref-Fontanive2019_3-6) Biller, B.; et al. (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](/source/ArXiv_(identifier)):[1903.02332](https://arxiv.org/abs/1903.02332), [Bibcode](/source/Bibcode_(identifier)):[2019MNRAS.485.4967F](https://ui.adsabs.harvard.edu/abs/2019MNRAS.485.4967F), [doi](/source/Doi_(identifier)):[10.1093/mnras/stz671](https://doi.org/10.1093%2Fmnras%2Fstz671), [S2CID](/source/S2CID_(identifier)) [84180618](https://api.semanticscholar.org/CorpusID:84180618).

1. ^ [***a***](#cite_ref-Diaz2011_4-0) [***b***](#cite_ref-Diaz2011_4-1) [***c***](#cite_ref-Diaz2011_4-2) [***d***](#cite_ref-Diaz2011_4-3) [***e***](#cite_ref-Diaz2011_4-4) [***f***](#cite_ref-Diaz2011_4-5) [***g***](#cite_ref-Diaz2011_4-6) Díaz, Rodrigo F.; et al. (2012), "The SOPHIE search for northern extrasolar planets IV. Massive companions in the planet-brown dwarf boundary", *Astronomy & Astrophysics*, **A113**: 538, [arXiv](/source/ArXiv_(identifier)):[1111.1168](https://arxiv.org/abs/1111.1168), [Bibcode](/source/Bibcode_(identifier)):[2012A&A...538A.113D](https://ui.adsabs.harvard.edu/abs/2012A&A...538A.113D), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201117935](https://doi.org/10.1051%2F0004-6361%2F201117935), [S2CID](/source/S2CID_(identifier)) [55322205](https://api.semanticscholar.org/CorpusID:55322205).

1. ^ [***a***](#cite_ref-Carrera_et_al_2022_5-0) [***b***](#cite_ref-Carrera_et_al_2022_5-1) Carrera, R.; et al. (February 2022), "OCCASO. IV. Radial velocities and open cluster kinematics", *Astronomy & Astrophysics*, **658**, [arXiv](/source/ArXiv_(identifier)):[2110.02110](https://arxiv.org/abs/2110.02110), [Bibcode](/source/Bibcode_(identifier)):[2022A&A...658A..14C](https://ui.adsabs.harvard.edu/abs/2022A&A...658A..14C), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202141832](https://doi.org/10.1051%2F0004-6361%2F202141832), A14.

1. ^ [***a***](#cite_ref-An2025_6-0) [***b***](#cite_ref-An2025_6-1) An, Qier; Brandt, Timothy D.; Brandt, G. Mirek; Venner, Alexander (2025-08-11), "Orbits and Masses for 156 Companions from Combined Astrometry and Radial Velocities, and A Validation of Gaia Non-Single Star Solutions", *[The Astrophysical Journal Supplement Series](/source/The_Astrophysical_Journal_Supplement_Series)*, [arXiv](/source/ArXiv_(identifier)):[2508.08374](https://arxiv.org/abs/2508.08374).

1. ^ [***a***](#cite_ref-Bonfanti_et_al_2016_7-0) [***b***](#cite_ref-Bonfanti_et_al_2016_7-1) [***c***](#cite_ref-Bonfanti_et_al_2016_7-2) [***d***](#cite_ref-Bonfanti_et_al_2016_7-3) [***e***](#cite_ref-Bonfanti_et_al_2016_7-4) [***f***](#cite_ref-Bonfanti_et_al_2016_7-5) [***g***](#cite_ref-Bonfanti_et_al_2016_7-6) [***h***](#cite_ref-Bonfanti_et_al_2016_7-7) Bonfanti, A.; et al. (2016), "Age consistency between exoplanet hosts and field stars", *Astronomy & Astrophysics*, **585**: 14, [arXiv](/source/ArXiv_(identifier)):[1511.01744](https://arxiv.org/abs/1511.01744), [Bibcode](/source/Bibcode_(identifier)):[2016A&A...585A...5B](https://ui.adsabs.harvard.edu/abs/2016A&A...585A...5B), [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201527297](https://doi.org/10.1051%2F0004-6361%2F201527297), [S2CID](/source/S2CID_(identifier)) [53971692](https://api.semanticscholar.org/CorpusID:53971692), A5.

1. **[^](#cite_ref-SIMBAD_8-0)** ["HD 156279"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+156279). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 13 October 2020.

1. ^ [***a***](#cite_ref-Bryan2016_9-0) [***b***](#cite_ref-Bryan2016_9-1) Bryan, Marta L.; et al. (2016), "Statistics of long period gas giant planets in known planetary systems", *The Astrophysical Journal*, **821** (2): 89, [arXiv](/source/ArXiv_(identifier)):[1601.07595](https://arxiv.org/abs/1601.07595), [Bibcode](/source/Bibcode_(identifier)):[2016ApJ...821...89B](https://ui.adsabs.harvard.edu/abs/2016ApJ...821...89B), [doi](/source/Doi_(identifier)):[10.3847/0004-637X/821/2/89](https://doi.org/10.3847%2F0004-637X%2F821%2F2%2F89), [S2CID](/source/S2CID_(identifier)) [19709252](https://api.semanticscholar.org/CorpusID:19709252).

1. **[^](#cite_ref-Feng2022_10-0)** Feng, Fabo; Butler, R. Paul; et al. (August 2022), "3D Selection of 167 Substellar Companions to Nearby Stars", *[The Astrophysical Journal Supplement Series](/source/The_Astrophysical_Journal_Supplement_Series)*, **262** (21): 21, [arXiv](/source/ArXiv_(identifier)):[2208.12720](https://arxiv.org/abs/2208.12720), [Bibcode](/source/Bibcode_(identifier)):[2022ApJS..262...21F](https://ui.adsabs.harvard.edu/abs/2022ApJS..262...21F), [doi](/source/Doi_(identifier)):[10.3847/1538-4365/ac7e57](https://doi.org/10.3847%2F1538-4365%2Fac7e57), [S2CID](/source/S2CID_(identifier)) [251864022](https://api.semanticscholar.org/CorpusID:251864022).

v t e Constellation of Draco List of stars in Draco Draco in Chinese astronomy Stars Bayer α (Thuban) β (Rastaban) γ (Eltanin) δ (Altais) ε (Tyl) ζ (Aldhibah) η (Athebyne) θ ι (Edasich) κ λ (Giausar) μ (Alrakis) ν (Kuma) ξ (Grumium) ο π ρ σ (Alsafi) τ υ φ χ ψ1 (Dziban) ψ2 ω Flamsteed 4 6 7 (Tianyi) 8 (Taiyi) 10 (i) 15 (A) 18 (g) 19 (h) 26 36 39 (b) 42 (Fafnir) 45 (d) 50 59 64 (e) 68 Variable TW YY AG BY CL CM CX DO EK HP V581 HR 3751 4126 4934 5811 6237 6518 6618 (Alruba) 6817 7137 7783 HD 109246 (Funi) 101364 128717 147379 156279 158259 176693 191939 Other 2MASS 1237+6526 2MASS J17554042+6551277 G 240-72 GD 356 Gliese 420 Gliese 625 Gliese 687 GRW +70 8247 Kepler-4 Kepler-10 Kepler-12 Kepler-90 Kepler-296 KOI-256 LP 71-82 Qatar-1 SDSS J1240+6710 Struve 2398 TOI-1136 WD 1856+534 WISE 1647+5632 WISE 1841+7000 Exoplanets HD 139357 b HD 167042 b ι Dra b (Hypatia) Kepler-4b Kepler-10b c Kepler-12b Kepler-90e f g h i Kepler-296b c d e f TOI-1452 b TrES-2b Star clusters LAMOST 1 Nebulae Cat's Eye Nebula NGC 6742 Galaxies NGC 3147 3197 3735 4121 4125 4221 4236 4319 4331 4332 4363 4441 4513 4545 4589 5678 5777 5866 5866B 5879 5905 5907 5949 5963 5965 5982 5985 6090 6248 6285 6286 6338 6340 6365 6373 6394 6412 6503 6505 6566 6621 6622 6670 6676 6786 6789 Other 1ES 1927+654 1ES 1959+650 3C 249.1 3C 305 3C 319 3C 343 3C 343.1 3C 351 3C 356 3C 371 3C 380 3C 390.3 3C 401 4C +72.26 4C 73.08 8C 1241+735 Abell 2218 BCG Bean galaxy Beaver galaxy BZQ J1727+5510 Draco Dwarf Draco II GB 1508+5714 Goldfish galaxy H1821+643 HFLS3 IERS B1946+708 IRAS F17179+5444 IRAS 18580+6527 J120011.1+680924.8 KKR 25 Markarian 817 Markarian 876 Original TRG PGC 39058 Porphyrion QSO B1823+568 RGZ J172749.5+534647 S5 1803+784 S5 2007+777 SDSS J1715+6008 Tadpole Galaxy UGC 9391 UGC 9405 UGC 11241 UGC 11411 WISEA J145223.62+611707.5 WN B1851+5707 Galaxy clusters Abell 2218 CL1358+62 Draco Supercluster NGC 5866 Group Astronomical events SN 2003jb SN 2005B SN 2016aps Swift J1644+57 Category

---
Adapted from the Wikipedia article [HD 156279](https://en.wikipedia.org/wiki/HD_156279) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/HD_156279?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.