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Kepler-296

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Kepler-296
Observation data
Epoch J2000      Equinox J2000
Constellation Draco
Right ascension 19h 06m 09.60253s[1]
Declination +49° 26′ 14.3969″[1]
Characteristics
Spectral type K7 V + M1 V[2]
Astrometry
Proper motion (μ) RA: 2.635 mas/yr[1]
Dec.: −16.375 mas/yr[1]
Parallax (π)4.5538 ± 0.5562 mas[1]
Distanceapprox. 720 ly
(approx. 220 pc)
Details[3]
Kepler-296 A
Mass0.498+0.067
−0.087 M☉
Radius0.480+0.066
−0.087 R☉
Surface gravity (log g)4.774+0.091
−0.059 cgs
Temperature3740±130 K
Metallicity [Fe/H]−0.08+0.28
−0.30 dex
Kepler-296 B
Mass0.326+0.070
−0.079 M☉
Radius0.322+0.060
−0.068 R☉
Surface gravity (log g)4.993+0.087
−0.063 cgs
Temperature3440±75 K
Metallicity [Fe/H]−0.08+0.28
−0.30 dex
Other designations
Gaia DR2 2132069633148965888, KOI-1422, KIC 11497958, 2MASS J19060960+4926143[4]
Database references
SIMBADdata
KICdata

Kepler-296 is a binary star system[3] in the constellation Draco. The primary star appears to be a late K-type main-sequence star, while the secondary is a red dwarf.[2]

Planetary system

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The following plot shows the approximate sizes of the planets in this system compared to planets in the Solar System.[5]

Five exoplanets have been detected around the system; all are believed to be orbiting the primary star rather than its dimmer companion.[3] Two planets in particular, Kepler-296e and Kepler-296f, are likely located in the habitable zone.[3] For the planetary system to remain stable, no additional giant planets can be located up to orbital radius 10.1 AU.[6]

The Kepler-296 planetary system[3]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b — 0.079 10.864384 <0.33 — 1.61 R🜨
c — 0.0521 5.8416366 <0.33 — 2.00 R🜨
d — 0.118 19.850291 <0.33 — 2.09 R🜨
e — 0.169 34.14211 <0.33 — 1.53 R🜨
f — 0.255 63.33627 <0.33 — 1.80 R🜨

See also

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References

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  1. ^ a b c d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b Lissauer, Jack J; Marcy, Geoffrey W; Bryson, Stephen T; Rowe, Jason F; Jontof-Hutter, Daniel; Agol, Eric; Borucki, William J; Carter, Joshua A; Ford, Eric B; Gilliland, Ronald L; Kolbl, Rea; Star, Kimberly M; Steffen, Jason H; Torres, Guillermo (2014). "Validation Ofkepler's Multiple Planet Candidates. Ii. Refined Statistical Framework and Descriptions of Systems of Special Interest". The Astrophysical Journal. 784 (1): 44. arXiv:1402.6352. Bibcode:2014ApJ...784...44L. doi:10.1088/0004-637X/784/1/44. S2CID 119108651.
  3. ^ a b c d e Barclay, Thomas; Quintana, Elisa V; Adams, Fred C; Ciardi, David R; Huber, Daniel; Foreman-Mackey, Daniel; Montet, Benjamin T; Caldwell, Douglas (2015). "The Five Planets in the Kepler-296 Binary System All Orbit the Primary: A Statistical and Analytical Analysis". The Astrophysical Journal. 809 (1): 7. arXiv:1505.01845. Bibcode:2015ApJ...809....7B. doi:10.1088/0004-637X/809/1/7. S2CID 37742564.
  4. ^ "Kepler-296". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 November 2017.
  5. ^ "Open Exoplanet Catalogue - Kepler-296 b". www.openexoplanetcatalogue.com. Retrieved 2021-03-19.
  6. ^ Becker, Juliette C.; Adams, Fred C. (2017), "Effects of Unseen Additional Planetary Perturbers on Compact Extrasolar Planetary Systems", Monthly Notices of the Royal Astronomical Society, 468 (1): 549–563, arXiv:1702.07714, Bibcode:2017MNRAS.468..549B, doi:10.1093/mnras/stx461, S2CID 119325005
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