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KIC 11026764

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KIC 11026764
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
Distance41 ± 1 ly
(12.7 ± 0.4 pc)
Details[4]
Mass1.18±0.08[5] M
Radius2.18 ± 0.05 R
Luminosity3.56 ± 0.14 L
Surface gravity (log g)3.884±0.009 cgs
Temperature5636±80[2] K
Metallicity [Fe/H]0.04[5] dex
Rotational velocity (v sin i)2.6[1] km/s
Age5.69±0.68[5] Gyr
Other designations
Gemma, BD+48 2882, GSC 03547-00012, TYC 3547-12-1, 2MASS J19212465+4830532
Database references
SIMBADdata

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 the Sun. Its diameter is 2.18 times the Sun and is aged at 5.94 billion years, slightly older than the Sun.[4]

The star exhibits a weak quasi-periodic pulsations with frequency around 0.0009 Hz.[2]

References[edit]

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "KIC 11026764". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 27 November 2016.
  2. 2.0 2.1 2.2 2.3 Li, Yaguang; Bedding, Timothy R.; Li, Tanda; Bi, Shaolan; Stello, Dennis; Zhou, Yixiao; White, Timothy R. (2020), "Asteroseismology of 36 Kepler subgiants – I. Oscillation frequencies, linewidths, and amplitudes", Monthly Notices of the Royal Astronomical Society, 495 (2): 2363–2386, arXiv:2005.06460, doi:10.1093/mnras/staa1335
  3. 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. Unknown parameter |s2cid= ignored (help)
  4. 4.0 4.1 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. Unknown parameter |s2cid= ignored (help)
  5. 5.0 5.1 5.2 Li, Tanda; Bedding, Timothy R.; Christensen-Dalsgaard, Jørgen; Stello, Dennis; Li, Yaguang; Keen, Matthew A. (2020), "Asteroseismology of 36 Kepler subgiants – II. Determining ages from detailed modelling", Monthly Notices of the Royal Astronomical Society, 495 (3): 3431–3462, arXiv:2006.00901, doi:10.1093/mnras/staa1350


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