Kepler-26
Kepler-26 is a star in the northern constellation of Lyra. It is located at the celestial coordinates: Right Ascension 18h 59m 45.8407s Declination +46° 33′ 59.438″.[2] With an apparent visual magnitude of 15.5,[3] this star is too faint to be seen with the naked eye.
.png.webp) The Kepler-26 system | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 18h 59m 45.8407s[2] |
| Declination | +46° 33′ 59.438″[2] |
| Apparent magnitude (V) | 15.473[3] |
| Characteristics | |
| Spectral type | K[4] |
| Astrometry | |
| Proper motion (μ) | RA: 9.540±0.053[2] mas/yr Dec.: −13.961±0.055[2] mas/yr |
| Parallax (π) | 2.9537 ± 0.0270[2] mas |
| Distance | 1,100 ± 10 ly (339 ± 3 pc) |
| Details | |
| Mass | 0.65[3] M☉ |
| Radius | 0.59[3] R☉ |
| Luminosity | 0.1[3] L☉ |
| Temperature | 4500[3] K |
| Metallicity [Fe/H] | -0.21[3] dex |
| Rotation | 17.918±0.005 days[5] |
| Rotational velocity (v sin i) | 1.9[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Planetary system
The two planets, Kepler-26b and Kepler-26c, were discovered by transit method in late 2011,[6] and classified as small (sub-Neptune) gas giants in 2016.[7] In 2012, the planetary candidate Kepler-26d was also detected. Instead of confirmation,[8] the planet Kepler-26e was discovered on much wider orbit in 2014.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| d (unconfirmed) | — | 0.039 | 3.543919 | — | — | 1.2 R⊕ |
| b | 5.1±0.7 M⊕ | 0.085 | 12.2829 | — | — | 2.78±0.11 R⊕ |
| c | 6.2±0.7 M⊕ | 0.107 | 17.2513 | — | — | 2.72±0.12 R⊕ |
| e | — | 0.22 | 46.827915 | — | — | 2.1 R⊕ |
References
- "Lyra – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Kepler-26b, NASA Ames Research Center, retrieved 2011-12-06
- Schneider, Jean, "Star: Kepler-26", Extrasolar Planets Encyclopaedia, Paris Observatory, archived from the original on 2012-05-05, retrieved 2013-12-18
- McQuillan, A.; Mazeh, T.; Aigrain, S. (2013). "Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators". The Astrophysical Journal Letters. 775 (1). L11. arXiv:1308.1845. Bibcode:2013ApJ...775L..11M. doi:10.1088/2041-8205/775/1/L11. S2CID 118557681.
- Steffen, Jason H.; Fabrycky, Daniel C.; Ford, Eric B.; Carter, Joshua A.; Desert, Jean-Michel; Fressin, Francois; Holman, Matthew J.; Lissauer, Jack J.; Moorhead, Althea V.; Rowe, Jason F.; Ragozzine, Darin; Welsh, William F.; Batalha, Natalie M.; Borucki, William J.; Buchhave, Lars A.; Bryson, Steve; Caldwell, Douglas A.; Charbonneau, David; Ciardi, David R.; Cochran, William D.; Endl, Michael; Everett, Mark E.; Gautier III, Thomas N.; Gilliland, Ron L.; Girouard, Forrest R.; Jenkins, Jon M.; Horch, Elliott; Howell, Steve B.; Isaacson, Howard; et al. (2012), Transit Timing Observations from Kepler: III. Confirmation of 4 Multiple Planet Systems by a Fourier-Domain Study of Anti-correlated Transit Timing Variations, arXiv:1201.5412, doi:10.1111/j.1365-2966.2012.20467.x, S2CID 11898578
- Cubillos, Patricio; Erkaev, Nikolai V.; Juvan, Ines; Fossati, Luca; Johnstone, Colin P.; Lammer, Helmut; Lendl, Monika; Odert, Petra; Kislyakova, Kristina G. (2016), "An overabundance of low-density Neptune-like planets", Monthly Notices of the Royal Astronomical Society, 466 (2): 1868–1879, arXiv:1611.09236, doi:10.1093/mnras/stw3103, S2CID 119408956
- Planet Kepler-26 d on exoplanet.eu
- Planet Kepler-26 e on exoplanet.eu
- Jontof-Hutter, Daniel; Ford, Eric B.; Rowe, Jason F.; Lissauer, Jack J.; Fabrycky, Daniel C.; Christa Van Laerhoven; Agol, Eric; Deck, Katherine M.; Holczer, Tomer; Mazeh, Tsevi (2015), Secure TTV Mass Measurements: Ten Kepler Exoplanets between 3 and 8 M⊕ with Diverse Densities and Incident Fluxes, arXiv:1512.02003, doi:10.3847/0004-637X/820/1/39, S2CID 11322397
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