KIC 11026764

KIC 11026764
Observation data; Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19h 21m 24.6295s
Declination	+48° 30′ 53.340″
Apparent magnitude (V)	9.71
Characteristics
Evolutionary stage	subgiant star
Spectral type	G1
Astrometry
Radial velocity (Rv)	-35.00 km/s
Proper motion (μ)	RA: -2466.98 mas/yr ; Dec.: 1180.09 mas/yr
Parallax (π)	78.91 ± 2.60 mas
Distance	41 ± 1 ly ; (12.7 ± 0.4 pc)
Details
Mass	1.18±0.08 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 K
Metallicity [Fe/H]	0.04 dex
Rotational velocity (v sin i)	2.6 km/s
Age	5.69±0.68 Gyr
Other designations
	Gemma, BD+48 2882, GSC 03547-00012, TYC 3547-12-1, 2MASS J19212465+4830532
Database references
SIMBAD	data

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]

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

References[]

^ ^a ^b ^c ^d ^e ^f ^g "KIC 11026764". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 27 November 2016.
^ ^a ^b ^c ^d 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
^ 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.
^ ^a ^b 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.
^ ^a ^b ^c 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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[SIMBAD-1] ^ ^a ^b ^c ^d ^e ^f ^g "KIC 11026764". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 27 November 2016.

[Li2020-2] 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

[m-z-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. S2CID 59269553.

[Metcalfe-4] 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.

[Li2020-2-5] 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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Observation data Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19^h 21^m 24.6295^s ^[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 (R_v)	-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
Gemma, BD+48 2882, GSC 03547-00012, TYC 3547-12-1, 2MASS J19212465+4830532
Database references
SIMBAD	data