Kepler-296
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.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Draco |
| Right ascension | 19h 06m 09.602s[1] |
| Declination | +49° 26′ 14.37″[1] |
| Characteristics | |
| Spectral type | K7 V + M1 V[2] |
| Astrometry | |
| Proper motion (μ) | RA: 2.0[3] mas/yr Dec.: −8.0[3] mas/yr |
| 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 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Planetary 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 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 | — | — | 1.61 R⊕ |
| c | — | 0.0521 | 5.8416366 | — | — | 2.00 R⊕ |
| d | — | 0.118 | 19.850291 | — | — | 2.09 R⊕ |
| e | — | 0.169 | 34.14211 | — | — | 1.53 R⊕ |
| f | — | 0.255 | 63.33627 | — | — | 1.80 R⊕ |
References
- Cutri, R. M. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. 2246. Bibcode:2003yCat.2246....0C.
- 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.
- Kepler Mission Team (2009). "VizieR Online Data Catalog: Kepler Input Catalog". VizieR On-line Data Catalog. 5133. Bibcode:2009yCat.5133....0K.
- 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.
- 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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