# HD 86264

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Star in the constellation Hydra

HD 86264 Observation data Epoch J2000.0 Equinox J2000.0 Constellation Hydra[1] Right ascension 09h 56m 57.83878s[2] Declination −15° 53′ 42.4291″[2] Apparent magnitude (V) 7.41[1] Characteristics Evolutionary stage main sequence[2] Spectral type F7V[3] Apparent magnitude (B) 7.920[1] Apparent magnitude (J) 6.505±0.019[1] Apparent magnitude (H) 6.344±0.038[1] Apparent magnitude (K) 6.224±0.023[1] B−V color index 0.510±0.011[1] Astrometry Radial velocity (Rv) 7.39±0.13[2] km/s Proper motion (μ) RA: −14.313±0.024 mas/yr[2] Dec.: −65.057±0.024 mas/yr[2] Parallax (π) 14.8646±0.0214 mas[2] Distance 219.4 ± 0.3 ly (67.27 ± 0.10 pc) Absolute magnitude (MV) 3.23[1] Details Mass 1.46±0.01 M☉[4] 1.36+0.04 −0.05 M☉[5] 1.42[6] M☉ Radius 1.53±0.02 R☉[4] 1.88[6] R☉ Luminosity 4.02±0.04[4] L☉ Surface gravity (log g) 4.13±0.04[5] cgs Temperature 6,616±39[4] K Metallicity [Fe/H] 0.26±0.03 Dex[7] +0.202[6] dex Rotational velocity (v sin i) 12.8±0.5[6] km/s Age 0.8±0.2 Gyr[4] 2.78+0.47 −0.70 Gyr[5] 2.24[6] Gyr Other designations BD−15°2938, HD 86264, HIP 48780, SAO 155612, PPM 222239[8] Database references SIMBAD data Exoplanet Archive data

**HD 86264** is a single[9] [star](/source/Star) with an [exoplanetary](/source/Exoplanet) companion in the [equatorial](/source/Celestial_equator) [constellation](/source/Constellation) of [Hydra](/source/Hydra_(constellation)). It is too faint to be readily visible to the naked eye with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 7.41.[1] The distance to this star, as determined by [parallax](/source/Stellar_parallax) measurements, is 219 [light-years](/source/Light-year), and it is drifting further away with a [radial velocity](/source/Radial_velocity) of +7.4 km/s.[2] A 2015 survey ruled out the existence of any stellar companions at projected distances above 30 [astronomical units](/source/Astronomical_unit).[9]

This is an [F-type main-sequence star](/source/F-type_main-sequence_star) with a [stellar classification](/source/Stellar_classification) of F7V.[3] It is about two billion years old with a modest level of [chromospheric activity](/source/Stellar_magnetic_field) and is spinning with a [projected rotational velocity](/source/Projected_rotational_velocity) of 13 km/s.[6] The star is larger and more massive compared to the Sun, and it has a higher [metallicity](/source/Metallicity)—the abundance of elements with a higher [atomic number](/source/Atomic_number) than helium.[6] It is radiating four times the luminosity of the Sun from its [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 6,616 K.[4]

## Planetary system

In August 2009, it was announced that an [exoplanet](/source/Exoplanet) was found in an [eccentric](/source/Orbital_eccentricity) orbit around this host star.[6] The extended [habitable zone](/source/Habitable_zone) for this star ranges from 1.50 [AU](/source/Astronomical_unit) out to 5.06 AU. The planet orbits between 0.86 AU and 4.86 AU, crossing nearly all of the habitable zone.[10] An estimate of the planet's inclination and true mass via [astrometry](/source/Astrometry), though with high error, was published in 2022.[11]

The HD 86264 planetary system[6] Companion (in order from star) Mass Semimajor axis (AU) Orbital period (days) Eccentricity Inclination (°) Radius b ≥7 ± 1.6 MJ 2.86 ± 0.07 1,475 ± 55 0.7 ± 0.2 — —

## See also

- [Lists of planets](/source/Lists_of_planets)

## 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) [***h***](#cite_ref-Anderson_Francis_2012_1-7) [***i***](#cite_ref-Anderson_Francis_2012_1-8) Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". *[Astronomy Letters](/source/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). [XHIP record for this object](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-ref=VIZ681510a8389ecb&-out.src=V%2F137D%2FXHIP&-nav=cat%3AV%2F137D%26tab%3A{V%2F137D%2FXHIP}%26key%3Asource%3DV%2F137D%2FXHIP%26HTTPPRM%3A&-source=V%2F137D%2FXHIP&-out=HIP&HIP=48780&-out=Comp&-out=Gr&-out=RAJ2000&-out=DEJ2000&-out=Dist&-out=X&-out=Y&-out=Z&-out=SpType&-out=Simbad&-out=Hpmag&-out=Lum&-out=Cst) at [VizieR](/source/VizieR).

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) [***g***](#cite_ref-GaiaDR3_2-6) 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%3D5685917541714610688%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-Houk_Smith-Moore_1978_3-0) [***b***](#cite_ref-Houk_Smith-Moore_1978_3-1) [Houk, N.](/source/Nancy_Houk); Smith-Moore, M. (1978). *Michigan catalogue of two-dimensional spectral types for the HD stars*. Vol. 4. Ann Arbor: Dept. of Astronomy, University of Michigan. [Bibcode](/source/Bibcode_(identifier)):[1988mcts.book.....H](https://ui.adsabs.harvard.edu/abs/1988mcts.book.....H).

1. ^ [***a***](#cite_ref-Bonfanti_et_al_2016_4-0) [***b***](#cite_ref-Bonfanti_et_al_2016_4-1) [***c***](#cite_ref-Bonfanti_et_al_2016_4-2) [***d***](#cite_ref-Bonfanti_et_al_2016_4-3) [***e***](#cite_ref-Bonfanti_et_al_2016_4-4) [***f***](#cite_ref-Bonfanti_et_al_2016_4-5) Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (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. ^ [***a***](#cite_ref-aguilera-gomez2018_5-0) [***b***](#cite_ref-aguilera-gomez2018_5-1) [***c***](#cite_ref-aguilera-gomez2018_5-2) Aguilera-Gómez, Claudia; et al. (2018). "Lithium abundance patterns of late-F stars: An in-depth analysis of the lithium desert". *Astronomy and Astrophysics*. **614**: A55. [arXiv](/source/ArXiv_(identifier)):[1803.05922](https://arxiv.org/abs/1803.05922). [Bibcode](/source/Bibcode_(identifier)):[2018A&A...614A..55A](https://ui.adsabs.harvard.edu/abs/2018A&A...614A..55A). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/201732209](https://doi.org/10.1051%2F0004-6361%2F201732209). [S2CID](/source/S2CID_(identifier)) [62799777](https://api.semanticscholar.org/CorpusID:62799777).

1. ^ [***a***](#cite_ref-Fischer2009_6-0) [***b***](#cite_ref-Fischer2009_6-1) [***c***](#cite_ref-Fischer2009_6-2) [***d***](#cite_ref-Fischer2009_6-3) [***e***](#cite_ref-Fischer2009_6-4) [***f***](#cite_ref-Fischer2009_6-5) [***g***](#cite_ref-Fischer2009_6-6) [***h***](#cite_ref-Fischer2009_6-7) [***i***](#cite_ref-Fischer2009_6-8) Fischer, Debra; et al. (2009). "Five planets and an independent confirmation of HD 196885 Ab from Lick Observatory". *The Astrophysical Journal*. **703** (2): 1545–1556. [arXiv](/source/ArXiv_(identifier)):[0908.1596](https://arxiv.org/abs/0908.1596). [Bibcode](/source/Bibcode_(identifier)):[2009ApJ...703.1545F](https://ui.adsabs.harvard.edu/abs/2009ApJ...703.1545F). [doi](/source/Doi_(identifier)):[10.1088/0004-637X/703/2/1545](https://doi.org/10.1088%2F0004-637X%2F703%2F2%2F1545). [S2CID](/source/S2CID_(identifier)) [15524804](https://api.semanticscholar.org/CorpusID:15524804).

1. **[^](#cite_ref-Gáspár_et_al_2016_7-0)** Gáspár, András; et al. (2016). ["The Correlation between Metallicity and Debris Disk Mass"](https://doi.org/10.3847%2F0004-637X%2F826%2F2%2F171). *The Astrophysical Journal*. **826** (2): 171. [arXiv](/source/ArXiv_(identifier)):[1604.07403](https://arxiv.org/abs/1604.07403). [Bibcode](/source/Bibcode_(identifier)):[2016ApJ...826..171G](https://ui.adsabs.harvard.edu/abs/2016ApJ...826..171G). [doi](/source/Doi_(identifier)):[10.3847/0004-637X/826/2/171](https://doi.org/10.3847%2F0004-637X%2F826%2F2%2F171). [S2CID](/source/S2CID_(identifier)) [119241004](https://api.semanticscholar.org/CorpusID:119241004).

1. **[^](#cite_ref-SIMBAD_8-0)** ["HD 86264"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+86264). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 2021-10-29.

1. ^ [***a***](#cite_ref-Magruder_Ginski_2015_9-0) [***b***](#cite_ref-Magruder_Ginski_2015_9-1) Mugrauer, M.; Ginski, C. (12 May 2015). ["High-contrast imaging search for stellar and substellar companions of exoplanet host stars"](https://doi.org/10.1093%2Fmnras%2Fstv771). *Monthly Notices of the Royal Astronomical Society*. **450** (3): 3127–3136. [Bibcode](/source/Bibcode_(identifier)):[2015MNRAS.450.3127M](https://ui.adsabs.harvard.edu/abs/2015MNRAS.450.3127M). [doi](/source/Doi_(identifier)):[10.1093/mnras/stv771](https://doi.org/10.1093%2Fmnras%2Fstv771). [hdl](/source/Hdl_(identifier)):[1887/49340](https://hdl.handle.net/1887%2F49340).

1. **[^](#cite_ref-Sato_et_al_2017_10-0)** Sato, S.; et al. (May 2017). "Climatological and ultraviolet-based habitability of possible exomoons in F-star systems". *Astronomische Nachrichten*. **338** (4): 413–427. [arXiv](/source/ArXiv_(identifier)):[1503.02560](https://arxiv.org/abs/1503.02560). [Bibcode](/source/Bibcode_(identifier)):[2017AN....338..413S](https://ui.adsabs.harvard.edu/abs/2017AN....338..413S). [doi](/source/Doi_(identifier)):[10.1002/asna.201613279](https://doi.org/10.1002%2Fasna.201613279). [S2CID](/source/S2CID_(identifier)) [118668172](https://api.semanticscholar.org/CorpusID:118668172).

1. **[^](#cite_ref-Feng2022_11-0)** Feng, Fabo; Butler, R. Paul; et al. (August 2022). ["3D Selection of 167 Substellar Companions to Nearby Stars"](https://doi.org/10.3847%2F1538-4365%2Fac7e57). *[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 Hydra List of stars in Hydra Hydra in Chinese astronomy Stars Bayer α (Alphard) β γ (Naga) δ ε (Ashlesha) ζ η θ ι (Ukdah) κ λ μ ν ξ ο π ρ σ (Minchir) τ1 τ2 υ1 (Zhang) υ2 φ1 φ2 φ3 χ1 χ2 ψ ω b1 b3 C F Flamsteed 1 2 3 6 (a) 9 10 12 (D) 14 15 17 19 20 21 23 24 25 26 27 (P) 28 29 33 (A) 34 37 44 47 48 50 51 (k) 52 (l) 54 (m) 55 56 57 58 (Solitaire) 59 60 10 Crt 17 Crt 20 Crt 2 Sex Variable R U V W TW EX HS KU LQ V361 V419 V421 V478 V484 HR 3378 3538 3749 (G) 3750 3858 (I) 3862 3919 3923 (Felis) 4162 4328 4339 (β Ant) 4445 5265 HD 72659 74156 82943 86226 86264 90156 (γ Ant) Other 2MASS 1114−2618 ESO 439-26 Gliese 328 Gliese 357 Gliese 433 Gliese 453 GJ 3634 HAT-P-30 HE 1256−2738 HE 1327−2326 LHS 2065 LHS 3003 LTT 3780 SDSS J090745.0+024507 WASP-25 WASP-36 WASP-84 WASP-166 (Filetdor) WISE 0855−0714 WISEA J1141−3326 Exoplanets Gliese 357 d HD 72659 b HD 74156 b c HD 82943 b c HD 86226 b HD 86264 b TW Hydrae b (unconfirmed) WASP-193b Star clusters Messier 48 Messier 68 NGC 5694 Price-Whelan 1 Nebulae Abell 33 Abell 35 NGC 3242 Southern Owl Nebula Galaxies Messier 83 NGC 2617 2642 2697 2708 2758 2835 2848 2865 2890 2935 2936 2937 2960 2962 2986 2992 3030 3052 3054 3081 3109 3124 3200 3285 3285B 3290 3305 3307 3308 3309 3311 3312 3313 3314 3315 3316 3336 3369 3383 3393 3402 3463 3464 3585 3621 3673 3717 3904 3923 3936 4980 4993 5042 5061 5078 5085 5101 5135 5260 5264 5495 5626 Other 3C 196.1 AM 1316−241 Arp 7 CTQ 327 ESO 510-G13 GAMA202627 GLEAM J0917−0012 Hydra A IC 535 MRC 1138−262 Peekaboo Galaxy PKS 1151−348 RX J0911.4+0551 SDSS J0841+0101 TN J0924−2201 Tololo 1247−232 ZwCl 1693 BCG Galaxy clusters Abell 754 Abell 3411 Abell 3412 Bullet Group Hickson 40 Astronomical events GW170817 Category

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Adapted from the Wikipedia article [HD 86264](https://en.wikipedia.org/wiki/HD_86264) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/HD_86264?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.