HD 156279
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Draco |
| Right ascension | 17h 12m 23.20514s[1] |
| Declination | +63° 21′ 07.5347″[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) | -20.6432 km/s |
| Proper motion (μ) | RA: -2.026[4] mas/yr Dec.: 160.207[4] mas/yr |
| Parallax (π) | 27.5995 ± 0.0273 mas[1] |
| Distance | 118.2 ± 0.1 ly (36.23 ± 0.04 pc) |
| Details | |
| Mass | 0.93[5] M☉ |
| Radius | 0.95[6] R☉ |
| Luminosity | 0.81[7] L☉ |
| Temperature | 5453[6] K |
| Metallicity [Fe/H] | 0.14±0.01[2] dex |
| Age | 4[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 156279 is a type K0 star, located 36.5 pc away from Earth (119.1 light years). 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 a stellar companions.[2]
Characteristics
HD 156279 has a stellar mass of 0.93 and a stellar radius of 0.95. 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.[6] HD 156279 has an apparent magnitude of 8.167[2] and an absolute magnitude of 5.27.[8][9] The star is slightly enriched in heavy elements, having 140% of solar abundance.[2]
Planetary system
Orbiting HD 156279 are two superjovian planets, an inner HD 156279 b (discovered in 2011)[8] and outer HD 156279 c (discovered in 2016).[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| HD 156279 b | ≥9.71±0.66 MJ | 0.495±0.017 | 131.05±0.54 | 0.708±0.018 | — | 1.11 RJ |
| HD 156279 c | ≥8.6±0.55 MJ | — | 4191+270 −310 |
0.23±0.02 | — | 0.9 RJ |
References
- ^ a b c Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d e 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
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ a b 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
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ a b "HD 156276". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 October 2020.
- ^ a b openexoplanetcatalogue.com
- ^ a b c d NASA archive
- ^ universeguide.com
- ^ a b Díaz, R. F.; Santerne, A.; Sahlmann, J.; Hébrard, G.; Eggenberger, A.; Santos, N. C.; Moutou, C.; Arnold, L.; Boisse, I.; Bonfils, X.; Bouchy, F.; Delfosse, X.; Desort, M.; Ehrenreich, D.; Forveille, T.; Lagrange, A. M.; Lovis, C.; Pepe, F.; Perrier, C.; Queloz, D.; Ségransan, D.; Udry, S.; Vidal-Madjar, A. (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
- ^ exoplanetkyoto.org
- ^ HD 82886 b on exoplanet.eu
- ^ HD 82886 c on exoplanet.eu
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