Kepler-25
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Lyra[1] |
Right ascension | 19h 06m 33.2143s[2] |
Declination | +39° 29′ 16.358″[2] |
Apparent magnitude (V) | 10.7[3] |
Characteristics | |
Spectral type | F[4] |
Astrometry | |
Proper motion (μ) | RA: ±0.040 −0.455[2] mas/yr Dec.: ±0.044 6.169[2] mas/yr |
Parallax (π) | 4.0822 ± 0.0236[2] mas |
Distance | 799 ± 5 ly (245 ± 1 pc) |
Details | |
Mass | +0.040 −0.051 1.159[5] M☉ |
Radius | ±0.015 1.297[5] R☉ |
Luminosity | +0.126 −0.128 2.406[5] L☉ |
Surface gravity (log g) | +0.007 −0.008 4.275[5] cgs |
Temperature | ±79 6270[6] K |
Metallicity [Fe/H] | ±0.10 −0.05[6] dex |
Rotation | ±0.039 days 23.147[7] |
Rotational velocity (v sin i) | 11.2[3] km/s |
Age | +0.81 −0.72 3.45[5] years |
Other designations | |
Database references | |
SIMBAD | data |
KIC | data |
Kepler-25 is a star in the northern constellation of Lyra. It is located at the celestial coordinates: Right Ascension 19h 06m 33.2204s Declination +39° 29′ 16.321″ 19h 21m 39.0s,.[8] With an apparent visual magnitude of 10.7,[3] this star is too faint to be seen with the naked eye.
In 2012, two planets were found transiting the star. These planets were confirmed through transit-timing variation method. A third planet was discovered through follow-up radial velocity measurements which was confirmed in January 2014.
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | <12.7 MJ | 0.068 | 6.2385 | — | — | 2.58 R⊕ |
c | <4.16 MJ | 0.11 | 12.7204 | — | — | 4.48 R⊕ |
d | 0.283 MJ | — | 123 | — | — | — |
References
- ↑ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
- 1 2 3 4 5 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 Data Release 2 Vizier catalog entry
- 1 2 3 Kepler-25b, NASA Ames Research Center, retrieved 2011-12-06
- 1 2 Schneider, Jean, "Star: Kepler-25", Extrasolar Planets Encyclopaedia, Paris Observatory, archived from the original on 2012-06-16, retrieved 2013-12-18
- 1 2 3 4 5 Silva Aguirre, V.; et al. (2015). "Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology". Monthly Notices of the Royal Astronomical Society. 452 (2): 2127–2148. arXiv:1504.07992. Bibcode:2015MNRAS.452.2127S. doi:10.1093/mnras/stv1388.
- 1 2 Huber, Daniel; et al. (2013). "Fundamental Properties of Kepler Planet-candidate Host Stars using Asteroseismology". The Astrophysical Journal. 767 (2). 127. arXiv:1302.2624. Bibcode:2013ApJ...767..127H. doi:10.1088/0004-637X/767/2/127.
- ↑ 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.
- ↑ "Kepler Discoveries". 2011-12-05.
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