HD 87883

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]

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[5]
Mass0.82±0.04 M☉
Radius0.76±0.03 R☉
Luminosity0.318±0.018 L☉
Surface gravity (log g)4.56[3] cgs
Temperature4,980±44 K
Metallicity [Fe/H]0.093±0.04 dex
Rotation38.6 days
Rotational velocity (v sin i)2.17±0.50 km/s
Age9.8 Gyr
Other designations
BD+34°2089, HD 87883, HIP 49699, SAO 61890, PPM 75021[6]
Database references
SIMBADdata
Exoplanet Archivedata
ARICNSdata
Extrasolar Planets
Encyclopaedia		data

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.[7]

The HD 87883 planetary system[5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥1.78±0.34 MJ 3.6±0.08 2,754±87 0.53±0.12 — —

See also
  • List of extrasolar planets

References
  1. 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. 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. 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. 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. 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. "HD 87883". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-06-25.
  7. 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.

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