Kepler-296

Last updated
Kepler-296
Observation data
Epoch J2000       Equinox J2000
Constellation Draco [1]
Right ascension 19h 06m 09.60253s [2]
Declination +49° 26′ 14.3969″ [2]
Characteristics
Spectral type K7 V + M1 V [3]
Astrometry
Proper motion (μ)RA: 2.635 mas/yr [2]
Dec.: −16.375 mas/yr [2]
Parallax (π)4.5538±0.5562  mas [2]
Distance approx. 720  ly
(approx. 220  pc)
Details [4]
Kepler-296 A
Mass 0.498+0.067
−0.087  M☉
Radius 0.480+0.066
−0.087  R☉
Surface gravity (log g)4.774+0.091
−0.059  cgs
Temperature 3740±130  K
Metallicity [Fe/H]−0.08+0.28
−0.30  dex
Kepler-296 B
Mass 0.326+0.070
−0.079  M☉
Radius 0.322+0.060
−0.068  R☉
Surface gravity (log g)4.993+0.087
−0.063  cgs
Temperature 3440±75  K
Metallicity [Fe/H]−0.08+0.28
−0.30  dex
Other designations
Kepler-296, KOI-1422, KIC 11497958, 2MASS J19060960+4926143 [5]
Database references
SIMBAD data
Exoplanet Archive data
KIC data

Kepler-296 is a binary star system [4] in the constellation Draco. The primary star appears to be a late K-type main-sequence star, while the secondary is a red dwarf. [3]

Contents

Planetary system

The following plot shows the approximate sizes of the planets in this system compared to planets in the Solar System. Kepler296scale.png
The following plot shows the approximate sizes of the planets in this system compared to planets in the Solar System.

Five exoplanets have been detected around the system; all are believed to be orbiting the primary star rather than its dimmer companion. [4] Two planets in particular, Kepler-296e and Kepler-296f, are likely located in the habitable zone. [4] For the planetary system to remain stable, no additional giant planets can be located up to orbital radius 10.1 AU. [7]

The Kepler-296 A planetary system [4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
c —0.0521+0.0088
−0.0086		5.8416366±0.000010<0.33—2.00+0.33
−0.32  R🜨
b —0.079±0.01310.864384+0.000051
−0.000046		<0.33—1.61+0.29
−0.27  R🜨
d —0.118±0.02019.850291+0.000061
−0.000057		<0.33—2.09+0.33
−0.32  R🜨
e —0.169+0.029
−0.028		34.14211±0.00025<0.33—1.53+0.27
−0.25  R🜨
f —0.255+0.043
−0.042		63.33627+0.00060
−0.00062		<0.33—1.80+0.31
−0.30  R🜨

See also

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 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.
  3. 1 2 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.
  4. 1 2 3 4 5 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.
  5. ↑ "Kepler-296". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 26 November 2017.
  6. ↑ "Open Exoplanet Catalogue - Kepler-296 b". www.openexoplanetcatalogue.com. Retrieved 2021-03-19.
  7. ↑ 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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