Kepler-71

Kepler-71
Observation data; Epoch J2000 Equinox ICRS
Constellation	Cygnus
Right ascension	19h 37m 27.716s
Declination	46° 17′ 08.941″
Apparent magnitude (V)	15.06[citation needed]
Characteristics
Evolutionary stage	main sequence[citation needed]
Spectral type	G8V
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
Astrometry
Radial velocity (Rv)	−23.88±0.02 km/s
Proper motion (μ)	RA: −2.379±0.021 mas/yr ; Dec.: −0.983±0.022 mas/yr
Parallax (π)	1.0647±0.0204 mas
Distance	3,060 ± 60 ly ; (940 ± 20 pc)
Details
Mass	0.923 M☉
Radius	0.816 R☉
Surface gravity (log g)	4.54±0.01 cgs
Temperature	5,545 K
Metallicity [Fe/H]	0.22 dex
Rotation	period 20 days
Age	2.5-4 Gyr
Other designations
	KOI-217, BOKS 40959, KIC 9595827, 2MASS J19392772+4617090, Gaia DR2 2080095679848047872
Database references
SIMBAD	data

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 `R`_J

References

↑ 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.
1 2 3 4 5 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.
1 2 3 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.
↑ Sebastián Otero; Christopher Watson; Patrick Wils. "VARIABLE STAR TYPE DESIGNATIONS IN VSX". Variable Star Index. Retrieved 2020-05-23.]
↑ 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.
1 2 3 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.
1 2 3 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.
↑ "Kepler-71". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-04-10.
↑ 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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[Roman1987-1] 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.

[GaiaDR3-2] 1 2 3 4 5 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.

[Howell_et_al_2010-3] 1 2 3 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.]

[Jönsson_et_al_2020-5] 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.

[Gusmao2017-6] 1 2 3 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.

[Zaleski2019-7] 1 2 3 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.

[Simbad-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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Observation data Epoch J2000 Equinox ICRS
Constellation	Cygnus^[1]
Right ascension	19^h 37^m 27.716^s^[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 (R_v)	−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]
Distance	3,060 ± 60 ly (940 ± 20 pc)
Details^[6]^[3]^[7]
Mass	0.923 `M`_☉
Radius	0.816 R_☉
Surface gravity (log g)	4.54±0.01 cgs
Temperature	5,545 K
Metallicity [Fe/H]	0.22 dex
Rotation	period 20 days
Age	2.5-4 Gyr
Other designations
KOI-217, BOKS 40959, KIC 9595827, 2MASS J19392772+4617090, Gaia DR2 2080095679848047872^[8]
Database references
SIMBAD	data

This page was redesigned at the edge.

Star characteristics

Planetary system

References