HD 86264

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HD 86264
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hydra
Right ascension 09h 56m 57.83861s[1]
Declination –15° 53′ 42.4230″[1]
Apparent magnitude (V) 7.41[2]
Characteristics
Spectral type F7V[3]
Apparent magnitude (B) 7.920[2]
Apparent magnitude (J) 6.505±0.019[2]
Apparent magnitude (H) 6.344±0.038[2]
Apparent magnitude (K) 6.224±0.023[2]
B−V color index 0.510±0.011[2]
Astrometry
Radial velocity (Rv)+7.66±0.23[1] km/s
Proper motion (μ) RA: –14.158[1] mas/yr
Dec.: –65.457[1] mas/yr
Parallax (π)14.7184 ± 0.0592[1] mas
Distance221.6 ± 0.9 ly
(67.9 ± 0.3 pc)
Absolute magnitude (MV)3.23[2]
Details
Mass1.46±0.01 M☉[4]
1.36+0.04
−0.05 M☉[5]
1.42[6] M☉
Radius1.53±0.02 R☉[4]
1.88[6] R☉
Luminosity4.02±0.04[4] L☉
Surface gravity (log g)4.13±0.04[5] cgs
Temperature6,616±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
Age0.8±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
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

HD 86264 is a single[9] star with an exoplanetary companion in the equatorial constellation of Hydra. It is too faint to be readily visible to the naked eye with an apparent visual magnitude of 7.41.[2] The distance to this star, as determined by parallax measurements, is 222 light-years, and it is drifting further away with a radial velocity of +7.7 km/s.[1] A 2015 survey ruled out the existence of any stellar companions at projected distances above 30 astronomical units.[9]

This is an F-type main-sequence star with a stellar classification of F7V.[3] It is about two billion years old with a modest level of chromospheric activity and is spinning with a 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 – the abundance of elements with a higher atomic number than helium.[6] It is radiating four times the luminosity of the Sun from its photosphere at an effective temperature of 6,616 K.[4]

Planetary system[]

In August 2009, it was announced that an exoplanet was found in an eccentric orbit around this host star.[6] The extended habitable zone for this star ranges from 1.50 AU out to 5.06 AU. The planet orbits between 0.86 AU and 4.86 AU, crossing nearly all of the habitable zone.[10]

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 1475 ± 55 0.7 ± 0.2 — —

See also[]

  • List of extrasolar planets

References[]

  1. ^ a b c d e f g 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.
  2. ^ a b c d e f g h Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.{{cite journal}}: CS1 maint: postscript (link)
  3. ^ a b Houk, Nancy; Smith-Moore, M. (1978). "Michigan catalogue of two-dimensional spectral types for the HD stars". 4. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1988mcts.book.....H. {{cite journal}}: Cite journal requires |journal= (help)
  4. ^ a b c d e f Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: 14. arXiv:1511.01744. Bibcode:2016A&A...585A...5B. doi:10.1051/0004-6361/201527297. S2CID 53971692. A5.
  5. ^ a b c 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:1803.05922. Bibcode:2018A&A...614A..55A. doi:10.1051/0004-6361/201732209. S2CID 62799777.
  6. ^ a b c d e f g h i 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:0908.1596. Bibcode:2009ApJ...703.1545F. doi:10.1088/0004-637X/703/2/1545. S2CID 15524804.
  7. ^ Gáspár, András; et al. (2016). "The Correlation between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv:1604.07403. Bibcode:2016ApJ...826..171G. doi:10.3847/0004-637X/826/2/171. S2CID 119241004.{{cite journal}}: CS1 maint: postscript (link)
  8. ^ "HD 86264". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-10-29.
  9. ^ a b Mugrauer, M.; Ginski, C. (12 May 2015). "High-contrast imaging search for stellar and substellar companions of exoplanet host stars". Monthly Notices of the Royal Astronomical Society. 450 (3): 3127–3136. doi:10.1093/mnras/stv771. Retrieved 19 June 2020.
  10. ^ 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:1503.02560. Bibcode:2017AN....338..413S. doi:10.1002/asna.201613279.

Coordinates: Sky map 09h 56m 57.8388s, −15° 53′ 42.438″

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