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] |
| 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 |
Kepler-71 is a yellow main sequence star in the constellation of Cygnus.
Star characteristics
[edit]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
[edit]The "Hot Jupiter" class planet Kepler-71b was discovered around Kepler-71 in 2010.[3]
| 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
[edit]- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "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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