Kepler-26 is a star in the northern constellation of Lyra. It is located at the celestial coordinates: Right Ascension 18h 59m 45.8408s 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.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 18h 59m 45.8408s[2] |
| Declination | +46° 33′ 59.438″[2] |
| Apparent magnitude (V) | 15.473[3] |
| Characteristics | |
| Spectral type | M0V[4] |
| Astrometry | |
| Proper motion (μ) | RA: 9.462(27) mas/yr[2] Dec.: −13.942(26) mas/yr[2] |
| Parallax (π) | 2.9378 ± 0.0211 mas[2] |
| Distance | 1,110 ± 8 ly (340 ± 2 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 |
.png)
Planetary system
editThe 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, and confirmed in 2014.[8] The planet Kepler-26e was discovered on a much wider orbit in 2014.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| d | — | 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
edit- ^ "Lyra – constellation boundary", The Constellations, International Astronomical Union, retrieved 2011-12-15
- ^ a b c d e 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 c d e f g h Kepler-26b, NASA Ames Research Center, archived from the original on 2012-05-03, retrieved 2011-12-06
- ^ a b Schneider, Jean, "Star: Kepler-26", Extrasolar Planets Encyclopaedia, 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", Monthly Notices of the Royal Astronomical Society, 421 (3): 2342, arXiv:1201.5412, Bibcode:2012MNRAS.421.2342S, doi:10.1111/j.1365-2966.2012.20467.x, S2CID 11898578
- ^ a b 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
- ^ Rowe, Jason F.; Bryson, Stephen T.; Marcy, Geoffrey W.; Lissauer, Jack J.; Jontof-Hutter, Daniel; Mullally, Fergal; Gilliland, Ronald L.; Issacson, Howard; Ford, Eric; Howell, Steve B.; Borucki, William J.; Haas, Michael; Huber, Daniel; Steffen, Jason H.; Thompson, Susan E.; Quintana, Elisa; Barclay, Thomas; Still, Martin; Fortney, Jonathan; Gautier, T. N.; Hunter, Roger; Caldwell, Douglas A.; Ciardi, David R.; Devore, Edna; Cochran, William; Jenkins, Jon; Agol, Eric; Carter, Joshua A.; Geary, John (2014). "Validation Ofkepler's Multiple Planet Candidates. III. Light Curve Analysis and Announcement of Hundreds of New Multi-Planet Systems". The Astrophysical Journal. 784 (1): 45. arXiv:1402.6534. Bibcode:2014ApJ...784...45R. doi:10.1088/0004-637X/784/1/45. S2CID 119118620.
- ^ 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