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]
| 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] |
| Distance | approx. 720 ly (approx. 220 pc) |
| Details[3] | |
| 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 | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Planetary system
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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]
| 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
editReferences
edit- ^ 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.
- ^ 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.
- ^ 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.
- ^ "Kepler-296". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 26 November 2017.
- ^ "Open Exoplanet Catalogue - Kepler-296 b". www.openexoplanetcatalogue.com. Retrieved 2021-03-19.
- ^ 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
External links
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