KIC 11026764
KIC 11026764, nicknamed "Gemma" by Li et al.,[2] is a G-type main sequence star whose characteristics have been extensively measured by the Kepler spacecraft because of its similarity to our Sun. Its diameter is 2.18 times the Sun and is aged at 5.94 billion years, slightly older than our Sun.[4]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 21m 24.6295s [1] |
| Declination | +48° 30′ 53.340″ [1] |
| Apparent magnitude (V) | 9.71[1] |
| Characteristics | |
| Evolutionary stage | subgiant star[2] |
| Spectral type | G1[3] |
| Astrometry | |
| Radial velocity (Rv) | -35.00[1] km/s |
| Proper motion (μ) | RA: -2466.98[1] mas/yr Dec.: 1180.09[1] mas/yr |
| Parallax (π) | 78.91 ± 2.60 mas |
| Distance | 41 ± 1 ly (12.7 ± 0.4 pc) |
| Details[4] | |
| Mass | 1.18±0.08[5] M☉ |
| Radius | 2.18 ± 0.05 R☉ |
| Luminosity | 3.56 ± 0.14 L☉ |
| Surface gravity (log g) | 3.884±0.009 cgs |
| Temperature | 5636±80[2] K |
| Metallicity [Fe/H] | 0.04[5] dex |
| Rotational velocity (v sin i) | 2.6[1] km/s |
| Age | 5.69±0.68[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The star exhibits a weak quasi-periodic pulsations with frequency around 0.0009 Hz.[2]
References
- "KIC 11026764". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 27 November 2016.
- Asteroseismology of 36 Kepler subgiants – I. Oscillation frequencies, linewidths and amplitudes, 2020, arXiv:2005.06460
- Molenda-Żakowicz, J.; Sousa, S. G.; Frasca, A.; Uytterhoeven, K.; Briquet, M.; Van Winckel, H.; Drobek, D.; Niemczura, E.; Lampens, P.; Lykke, J.; Bloemen, S.; Gameiro, J. F.; Jean, C.; Volpi, D.; Gorlova, N.; Mortier, A.; Tsantaki, M.; Raskin, G. (2013). "Atmospheric parameters of 169 F-, G-, K- and M-type stars in the Kepler field". Monthly Notices of the Royal Astronomical Society. 434 (2): 1422. arXiv:1306.6011. Bibcode:2013MNRAS.434.1422M. doi:10.1093/mnras/stt1095. S2CID 59269553.
- Metcalfe, T. S.; Monteiro, M. J. P. F. G.; Thompson, M. J.; Molenda-Żakowicz, J.; Appourchaux, T.; Chaplin, W. J.; Doğan, G.; Eggenberger, P.; Bedding, T. R.; Bruntt, H.; Creevey, O. L.; Quirion, P.-O.; Stello, D.; Bonanno, A.; Silva Aguirre, V.; Basu, S.; Esch, L.; Gai, N.; Di Mauro, M. P.; Kosovichev, A. G.; Kitiashvili, I. N.; Suárez, J. C.; Moya, A.; Piau, L.; García, R. A.; Marques, J. P.; Frasca, A.; Biazzo, K.; Sousa, S. G.; et al. (2010). "A Precise Asteroseismic Age and Radius for the Evolved Sun-Like Star Kic 11026764". The Astrophysical Journal. 723 (2): 1583–1598. arXiv:1010.4329. Bibcode:2010ApJ...723.1583M. doi:10.1088/0004-637X/723/2/1583. S2CID 56123879.
- Asteroseismology of 36 Kepler subgiants – II. Determining ages from detailed modelling, 2020, arXiv:2006.00901
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