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]
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Observation data Epoch J2000 Equinox J2000 | |
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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]
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