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 43.14059s[1]
Declination +34° 14′ 32.1466″[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: −64.293±0.027 mas/yr[1]
Dec.: −61.438±0.025 mas/yr[1]
Parallax (π)54.6678 ± 0.0295 mas[1]
Distance59.66 ± 0.03 ly
(18.292 ± 0.010 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

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 the 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 do 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, at 6.31+0.31
−0.32
 MJ
.[6][9]

The HD 87883 planetary system[6]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(years)
Eccentricity Inclination Radius
b 6.31+0.31
−0.32
 MJ
3.77+0.12
−0.094
8.23+0.32
−0.34
0.720+0.038
−0.027
16.8+1.7
−1.4
°

See also

edit

References

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  1. ^ a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 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.{{cite web}}: 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.
  9. ^ Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.