Kepler-29

Kepler-29 is a Sun-like star in the northern constellation of Cygnus. It is located at the celestial coordinates: Right Ascension 19h 53m 23.6020s, Declination +47° 29′ 28.436″.[2] With an apparent visual magnitude of 15.456,[3] this star is too faint to be seen with the naked eye. It is a solar analog, having a close mass, radius, and temperature as the Sun. Currently the age of the star has not been determined due to its 2780 light-year (850 parsecs) distance. As of 2016 no Jovian exoplanets of 0.9–1.4 MJ have been found at a distance of 5 AU. [7]

Kepler-29
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus[1]
Right ascension 19h 53m 23.6020s[2]
Declination +47° 29′ 28.436″[2]
Apparent magnitude (V) 15.456±0.025[3]
Characteristics
Spectral type G5V[4]
Astrometry
Proper motion (μ) RA: 6.326±0.069[2] mas/yr
Dec.: 16.226±0.049[2] mas/yr
Parallax (π)1.1739 ± 0.0377[2] mas
Distance2,780 ± 90 ly
(850 ± 30 pc)
Details
Mass0.761+0.024
−0.028[5] M☉
Radius0.732+0.033
−0.031[5] R☉
Surface gravity (log g)4.6±0.1[5] cgs
Temperature5378±60[5] K
Metallicity [Fe/H]−0.44±0.04[5] dex
Other designations
Gaia DR2 2086435189017387264, KOI-738, KIC 205071984, 2MASS J19532359+4729284[6]
Database references
SIMBADdata
KICdata

Planetary system

In 2011 an analysis of the first four months of data from the Kepler space telescope detected 1235 planetary candidates two of which orbited this star.[8] Later study of the transit-timing variations of the system lead to the confirmation of both planets.[9] The planetary orbits are lying in Orbital resonance to each other, with orbital period ratio being exactly 7:9.[10]

The Kepler-29 planetary system[9][5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 5.0+1.5
−1.3 M⊕		 0.09 10.33966+0.00015
−0.00017		 — — 2.55±0.12 R⊕
c 4.5±1.1 M⊕ 0.11 13.28633+0.00031
−0.00027		 — — 2.34+0.12
−0.11 R⊕

References
  1. "Cygnus – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
  2. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H.Vizier catalog entry
  4. Schneider, Jean, "Star: Kepler-29", Extrasolar Planets Encyclopaedia, Paris Observatory, archived from the original on 2012-04-26, retrieved 2011-12-06
  5. Vissapragada, Shreyas; et al. (2020). "Diffuser-assisted Infrared Transit Photometry for Four Dynamically Interacting Kepler Systems". The Astronomical Journal. 159 (3). 108. arXiv:1907.04445. Bibcode:2020AJ....159..108V. doi:10.3847/1538-3881/ab65c8. S2CID 195874295.
  6. "Kepler-29". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-06.
  7. Open Exoplanet Catalogue, Kepler-29
  8. Borucki, William J.; et al. (2011). "Characteristics of Planetary Candidates Observed by Kepler. II. Analysis of the First Four Months of Data". The Astrophysical Journal. 736 (1). 19. arXiv:1102.0541. Bibcode:2011ApJ...736...19B. doi:10.1088/0004-637X/736/1/19.
  9. Fabrycky, Daniel C.; et al. (2012). "Transit Timing Observations from Kepler. IV. Confirmation of Four Multiple-planet Systems by Simple Physical Models". The Astrophysical Journal. 750 (2). 114. arXiv:1201.5415. Bibcode:2012ApJ...750..114F. doi:10.1088/0004-637X/750/2/114.
  10. Panichi, Federico; Goździewski, Krzyszof; Turchetti, Giorgio (2017), "The Reversibility Error Method (REM): a new,dynamical fast indicator for planetary dynamics", Monthly Notices of the Royal Astronomical Society, 468: 469–491, arXiv:1703.10596, doi:10.1093/mnras/stx374, S2CID 119391438

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