Astronomy:Kepler-107

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Short description: Star in the constellation Cygnus
Kepler-107
Observation data
Equinox J2000.0]] (ICRS)
Constellation Cygnus
Right ascension  19h 48m 06.77346s[1]
Declination +48° 12′ 30.9642″[1]
Apparent magnitude (V) 12.70
Characteristics
Spectral type G2V[2]
Apparent magnitude (B) 13.34[2]
Apparent magnitude (V) 12.70[2]
Apparent magnitude (J) 11.39[2]
Apparent magnitude (K) 11.06[2]
Astrometry
Radial velocity (Rv)5.64423 ± 4.5 × 10–4[2] km/s
Proper motion (μ) RA: −9.393[1] mas/yr
Dec.: 0.158[1] mas/yr
Parallax (π)1.9259 ± 0.0092[1] mas
Distance1,694 ± 8 ly
(519 ± 2 pc)
Details
Mass1.238±0.029[2] M
Radius1.447±0.014[2] R
Surface gravity (log g)(Spectroscopic) 4.28 ± 0.10 cgs
(Asteroseismic) 4.210 ± 0.013[2] cgs
Temperature5854±61[2] K
Metallicity [Fe/H]0.321±0.065[2] dex
Rotational velocity (v sin i)3.6±0.5[2] km/s
Age4.29+0.70
−0.56
[2] Gyr
Other designations
Kepler-107, KOI-117, Gaia DR2 2086625752425381632, KIC 10875245, 2MASS J19480677+4812309[3]
Database references
SIMBADdata

Kepler-107 is a star about 1,694 light-years (519 parsecs) away in the constellation Cygnus. It is a spectral type G2 star. An imaging survey in 2016 failed to find any stellar companions to it.[4]

Planetary system

Kepler-107 has four known planets discovered in 2014.[5][6][7][8] A giant impact is the likely origin of two planets in the system.[2] Kepler-107 c is more than twice as dense (about 12.6 g cm−3) as the innermost exoplanet Kepler-107 b (about 5.3 g  cm−3).[2]

The Kepler-107 planetary system[9]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 3.8+1.8
−1.7
 M
0.04544±0.00036 3.1800218±0.0000029 <0.10 89.05±0.67° 1.536±0.025 R
c 10.0±2.0 M 0.06064±0.00048 4.901452±0.0 <0.080 89.49+0.34
−0.44
°
1.597±0.026 R
d <7.7 M 0.08377±0.00065 7.95839±0.00012 <0.11 87.55+0.64
−0.48
°
0.860±0.060 R
e 14.1±3.3 M 0.12638±0.00099 14.749143±0.000019 <0.10 89.67±0.22° 2.903±0.035 R

References

  1. 1.0 1.1 1.2 1.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 Bonomo, Aldo S.; Zeng, Li; Damasso, Mario; Leinhardt, Zoë M.; Justesen, Anders B.; Lopez, Eric; Lund, Mikkel N.; Malavolta, Luca et al. (May 2019). "A giant impact as the likely origin of different twins in the Kepler-107 exoplanet system". Nature Astronomy 3 (5): 416–423. doi:10.1038/s41550-018-0684-9. Bibcode2019NatAs...3..416B. 
  3. Kepler-107 -- Rotationally variable Star
  4. Kraus, Adam L.; Ireland, Michael J.; Huber, Daniel; Mann, Andrew W.; Dupuy, Trent J. (2016), "The Impact of Stellar Multiplicity on Planetary Systems. I. The Ruinous Influence of Close Binary Companions", The Astronomical Journal 152 (1): 8, doi:10.3847/0004-6256/152/1/8, Bibcode2016AJ....152....8K 
  5. "Exoplanets Data Explorer | Exoplanets - Detail View". http://exoplanets.org/detail/Kepler-107_b. 
  6. "Exoplanets Data Explorer | Exoplanets - Detail View". http://exoplanets.org/detail/Kepler-107_c. 
  7. "Exoplanets Data Explorer | Exoplanets - Detail View". http://exoplanets.org/detail/Kepler-107_d. 
  8. "Exoplanets Data Explorer | Exoplanets - Detail View". http://exoplanets.org/detail/Kepler-107_e. 
  9. Bonomo, A. S. et al. (April 2023). "Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems". Astronomy & Astrophysics. doi:10.1051/0004-6361/202346211.