Astronomy:Kepler-296

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Short description: Star in the constellation Draco
Kepler-296
Observation data
Equinox J2000.0]] (ICRS)
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[1] mas/yr
Dec.: −16.375[1] mas/yr
Parallax (π)4.5538 ± 0.5562[1] mas
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
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

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

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. 2.0 2.1 Lissauer, Jack J; Marcy, Geoffrey W; Bryson, Stephen T; Rowe, Jason F; Jontof-Hutter, Daniel; Agol, Eric; Borucki, William J; Carter, Joshua A et al. (2014). "Validation Ofkepler's Multiple Planet Candidates. Ii. Refined Statistical Framework and Descriptions of Systems of Special Interest". The Astrophysical Journal 784 (1): 44. doi:10.1088/0004-637X/784/1/44. Bibcode2014ApJ...784...44L. 
  3. 3.0 3.1 3.2 3.3 3.4 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. doi:10.1088/0004-637X/809/1/7. Bibcode2015ApJ...809....7B. 
  4. "Kepler-296". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-296. 
  5. "Open Exoplanet Catalogue - Kepler-296 b". http://www.openexoplanetcatalogue.com/planet/Kepler-296%20b/. 
  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, doi:10.1093/mnras/stx461, Bibcode2017MNRAS.468..549B 

External links