HD 87883

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HD 87883
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Leo Minor
Right ascension 10h 08m 43.14091s[1]
Declination +34° 14′ 32.1487″[1]
Apparent magnitude (V) 7.56[2]
Characteristics
Spectral type K0V[3]
Apparent magnitude (B) 8.525[2]
Apparent magnitude (J) 5.839±0.020[2]
Apparent magnitude (H) 5.441±0.046[2]
Apparent magnitude (K) 5.314±0.020[2]
B−V color index 0.965±0.013[2]
Astrometry
Radial velocity (Rv)+9.320±0.003[4] km/s
Proper motion (μ) RA: −64.565±0.064[1] mas/yr
Dec.: −61.581±0.078[1] mas/yr
Parallax (π)54.6421 ± 0.0369[1] mas
Distance59.69 ± 0.04 ly
(18.30 ± 0.01 pc)
Absolute magnitude (MV)6.27[5]
Details
Mass0.80±0.02[6] M☉
Radius0.76±0.03[5] R☉
Luminosity0.338±0.008[6] L☉
Surface gravity (log g)4.56[3] cgs
Temperature4,980±44[5] K
Metallicity [Fe/H]0.093±0.04[5] dex
Rotation38.6 days[5]
Rotational velocity (v sin i)2.17±0.50[5] km/s
Age7.6+2.8
−1.8[6] Gyr
Other designations
BD+34°2089, HD 87883, HIP 49699, SAO 61890, PPM 75021[7]
Database references
SIMBADdata
Exoplanet Archivedata
ARICNSdata
Extrasolar Planets
Encyclopaedia		data

HD 87883 is star in the northern constellation of Leo Minor. It is too faint to be viewed with the naked eye, having an apparent visual magnitude of 7.56.[2] The star is located at a distance of 59.7 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +9.3 km/s.[4] It has an absolute magnitude of 6.27.[5]

This is an ordinary K-type main-sequence star with a stellar classification of K0V.[3] It has a modest level of chromospheric activity,[5] and is rotating with a period of 38.6 days.[5] The star is smaller than the Sun, with 82% of the mass of the Sun and 76% of the Sun's radius. The age of this star is 9.8 billion years, compared with 4.6 billion years for our Sun. It is radiating 32% of the luminosity of the Sun from its photosphere at an effective temperature of 4,980 K.[5]

In August 2009, this star was found to have a planet via the radial velocity method. The orbital solution shows it to be a Super-Jupiter body in an elliptical orbit with a period of 7.54 yr and a typical separation of 3.6 AU. A relatively high deviation on the model fit suggests there may be an additional planetary companion in a close, perturbing orbit of the star.[5] The orbital parameters of the known planet does not preclude the existence of an Earth-mass planet with a dynamically-stable orbit in the habitable zone.[8] Since its orbit is relatively face-on, its true mass deviates significantly from its minimum mass, and is 6.31+0.31
−0.32 MJ.[6]

The HD 87883 planetary system[6]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 6.31+0.31
−0.32 MJ 		3.77+0.12
−0.94 		3,003+117
−124 		0.720+0.038
−0.027 		— —

See also[]

  • List of extrasolar planets

References[]

  1. ^ a b c d e f 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 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.
  3. ^ a b c Luck, R. Earle (January 2017). "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants". The Astronomical Journal. 153 (1): 19. arXiv:1611.02897. Bibcode:2017AJ....153...21L. doi:10.3847/1538-3881/153/1/21. S2CID 119511744. 21.
  4. ^ a b Soubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv:1804.09370. Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID 52952408.
  5. ^ a b c d e f g h i j k 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.
  6. ^ a b c d e Li, Yiting; Brandt, Timothy D.; Brandt, G. Mirek; Dupuy, Trent J.; Michalik, Daniel; Jensen-Clem, Rebecca; Zeng, Yunlin; Faherty, Jacqueline; Mitra, Elena L. (2021). "Precise Masses and Orbits for Nine Radial-velocity Exoplanets". The Astronomical Journal. 162 (6): 266. arXiv:2109.10422. Bibcode:2021AJ....162..266L. doi:10.3847/1538-3881/ac27ab. S2CID 237592581.
  7. ^ "HD 87883". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-06-25.CS1 maint: postscript (link)
  8. ^ Agnew, Matthew T.; et al. (November 2017). "Stable habitable zones of single Jovian planet systems". Monthly Notices of the Royal Astronomical Society. 471 (4): 4494−4507. arXiv:1706.05805. Bibcode:2017MNRAS.471.4494A. doi:10.1093/mnras/stx1449. S2CID 119227856.

Coordinates: Sky map 10h 08m 43.1395s, +34° 14′ 32.135″

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