Kepler-71

Kepler-71
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus[1]
Right ascension 19h 37m 27.716s[2]
Declination 46° 17′ 08.941″[2]
Apparent magnitude (V) 15.06[citation needed]
Characteristics
Evolutionary stage main sequence[citation needed]
Spectral type G8V[3]
V−R color index −0.29
R−I color index 0.46
J−H color index 0.377
J−K color index 0.457
Variable type ROT[4]
Astrometry
Radial velocity (Rv)−23.88±0.02[5] km/s
Proper motion (μ) RA: −2.379±0.021 mas/yr[2]
Dec.: −0.983±0.022 mas/yr[2]
Parallax (π)1.0647±0.0204 mas[2]
Distance3,060 ± 60 ly
(940 ± 20 pc)
Details[6][3][7]
Mass0.923 M☉
Radius0.816 R☉
Surface gravity (log g)4.54±0.01 cgs
Temperature5,545 K
Metallicity [Fe/H]0.22 dex
Rotationperiod 20 days
Age2.5-4 Gyr
Other designations
KOI-217, BOKS 40959, KIC 9595827, 2MASS J19392772+4617090, Gaia DR2 2080095679848047872[8]
Database references
SIMBADdata

Kepler-71 is a yellow main sequence star in the constellation of Cygnus.

Star characteristics

Kepler-71 is enriched by heavy elements at 170% of Sun metallicity, young and has a very prominent starspot activity. Starspots are covering about 40% of star surface at transit latitudes, each planetary transit passing over an average six starspots.[6] The bright facula regions are even more extensive.[9] Unlike Sun, the photosphere of Kepler-71 rotates nearly like rigid body, with differential rotation not exceeding 2%.[7]

Planetary system

The "Hot Jupiter" class planet Kepler-71b was discovered around Kepler-71 in 2010.[3]

The Kepler-71 planetary system[6][7]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination
(°) 		Radius
b — 0.05029+0.00002
−0.00006 		3.905079476+0.000008
−0.000009 		0 89.8+0.2
−0.4 		1.1987±0.0044 RJ

References

  1. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. ^ a b c d 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.
  3. ^ a b c Howell, Steve B.; et al. (December 2010). "Keplerobservations of Three Pre-Launch Exoplanet Candidates: Discovery of Two Eclipsing Binaries and a New Exoplanet". The Astrophysical Journal. 725 (2): 1633–1643. arXiv:1010.4106. Bibcode:2010ApJ...725.1633H. doi:10.1088/0004-637X/725/2/1633. S2CID 37374489.
  4. ^ Sebastián Otero; Christopher Watson; Patrick Wils. "VARIABLE STAR TYPE DESIGNATIONS IN VSX". Variable Star Index. Retrieved 2020-05-23.]
  5. ^ Jönsson, Henrik; et al. (August 17, 2020). "APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South". The Astronomical Journal. 160 (3). American Astronomical Society: 120. arXiv:2007.05537. Bibcode:2020AJ....160..120J. doi:10.3847/1538-3881/aba592. ISSN 0004-6256.
  6. ^ a b c Gusmão, Eber A.; Selhorst, Caius L.; Oliveira, Alexandre S. (2016). "Analysis of Kepler-71 Activity Through Planetary Transit". Proceedings of the International Astronomical Union. 12: 140–142. arXiv:1703.00883. doi:10.1017/S1743921317004057. S2CID 119106951.
  7. ^ a b c Zaleski, S. M.; Valio, A.; Marsden, S. C.; Carter, B. D. (2019). "Differential rotation of Kepler-71 via transit photometry mapping of faculae and starspots" (PDF). Monthly Notices of the Royal Astronomical Society. 484 (1): 618–630. Bibcode:2019MNRAS.484..618Z. doi:10.1093/mnras/sty3474. Archived from the original (PDF) on 2020-05-08. Retrieved 2020-09-02.
  8. ^ "Kepler-71". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-04-10.
  9. ^ Schrijver, Carolus J. (2020). "Testing the Solar Activity Paradigm in the Context of Exoplanet Transits". The Astrophysical Journal. 890 (2): 121. arXiv:2001.01093. Bibcode:2020ApJ...890..121S. doi:10.3847/1538-4357/ab67c1. S2CID 209862471.


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