Astronomy:Kepler-25
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Short description: Yellow-white hued star in the constellation Lyra
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 19h 06m 33.2143s[2] |
| Declination | +39° 29′ 16.358″[2] |
| Apparent magnitude (V) | 10.623±0.053[3] |
| Characteristics | |
| Spectral type | F[4] |
| Apparent magnitude (B) | 11.337±0.016[3] |
| Variable type | Planetary transit variable |
| Astrometry | |
| Proper motion (μ) | RA: −0.455±0.040[2] mas/yr Dec.: 6.169±0.044[2] mas/yr |
| Parallax (π) | 4.0822 ± 0.0236[2] mas |
| Distance | 799 ± 5 ly (245 ± 1 pc) |
| Details | |
| Mass | 1.159+0.040 −0.051[5] M☉ |
| Radius | 1.297±0.015[5] R☉ |
| Luminosity | 2.406+0.126 −0.128[5] L☉ |
| Surface gravity (log g) | 4.275+0.007 −0.008[5] cgs |
| Temperature | 6270±79[6] K |
| Metallicity [Fe/H] | −0.05±0.10[6] dex |
| Rotation | 23.147±0.039 days[7] |
| Rotational velocity (v sin i) | 9.5[8] km/s |
| Age | 3.45+0.81 −0.72[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-25 is a star in the northern constellation of Lyra.[1] It is slightly larger and more massive than the Sun, with a luminosity 21⁄2 times that of the Sun.[5] With an apparent visual magnitude of 10.6,[3] this star is too faint to be seen with the naked eye.
Planetary system
In 2011, two candidate planets were found transiting this star by the Kepler space telescope.[10] These planets are very close to yet not lie in the 1:2 orbital resonance to each other, indicating the absence of other planetary objects in the inner part of the planetary systems.[11] These planets were confirmed through transit-timing variation method.[12] A third planet was discovered through follow-up radial velocity measurements and was confirmed in January 2014.[8]
The plane of planetary orbits is well aligned with the equatorial plane of the star, misalignment angle equal to 7±8°[13]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 8.7+2.5 −2.3 M⊕ |
0.068 | 6.238297±0.000017 | 0.0029+0.0023 −0.0017 |
92.827+0.084 −0.083° |
2.748+0.038 −0.035 R⊕ |
| c | 15.2+1.3 −1.6 M⊕ |
0.11 | 12.7207±0.0001 | 0.0061+0.0049 −0.0041 |
92.764+0.042 −0.039° |
5.217+0.070 −0.065 R⊕ |
| d | 71.9±9.8 M⊕ | — | 122.4+0.0 −0.7 |
0.13+0.13 −0.09 |
— | — |
References
- ↑ 1.0 1.1 Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific 99 (617): 695–699. doi:10.1086/132034. Bibcode: 1987PASP...99..695R. Vizier query form
- ↑ 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Henden, A. A. et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H 2336. Bibcode: 2016yCat.2336....0H. Vizier catalog entry
- ↑ 4.0 4.1 Schneider, Jean, Star: Kepler-25, http://exoplanet.eu/star.php?st=Kepler-25, retrieved 2013-12-18
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 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. doi:10.1093/mnras/stv1388. Bibcode: 2015MNRAS.452.2127S. https://academic.oup.com/mnras/article/452/2/2127/1064904.
- ↑ 6.0 6.1 Huber, Daniel et al. (2013). "Fundamental Properties of Kepler Planet-candidate Host Stars using Asteroseismology". The Astrophysical Journal 767 (2): 127. doi:10.1088/0004-637X/767/2/127. Bibcode: 2013ApJ...767..127H.
- ↑ 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. doi:10.1088/2041-8205/775/1/L11. Bibcode: 2013ApJ...775L..11M.
- ↑ 8.0 8.1 Marcy, Geoffrey W. et al. (2014). "Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets". The Astrophysical Journal Supplement Series 210 (2): 20. doi:10.1088/0067-0049/210/2/20. Bibcode: 2014ApJS..210...20M.
- ↑ "Kepler-25". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Kepler-25.
- ↑ Borucki, William J. et al. (2011). "Characteristics of Planetary Candidates Observed by Kepler. II. Analysis of the First Four Months of Data". The Astrophysical Journal 736 (1): 19. doi:10.1088/0004-637X/736/1/19. Bibcode: 2011ApJ...736...19B.
- ↑ Migaszewski, Cezary; Gozdziewski, Krzysztof (2018), "A periodic configuration of the Kepler-25 planetary system?", Monthly Notices of the Royal Astronomical Society 480 (2): 1767–1777, doi:10.1093/mnras/sty1972
- ↑ Steffen, Jason H. et al. (2012). "Transit timing observations from Kepler - III. Confirmation of four multiple planet systems by a Fourier-domain study of anticorrelated transit timing variations". Monthly Notices of the Royal Astronomical Society 421 (3): 2342–2354. doi:10.1111/j.1365-2966.2012.20467.x. Bibcode: 2012MNRAS.421.2342S.
- ↑ Albrecht, Simon; Winn, Joshua N.; Marcy, Geoffrey W.; Howard, Andrew W.; Isaacson, Howard; Johnson, John A. (2013), "Low Stellar Obliquities in Compact Multiplanet Systems", The Astrophysical Journal 771 (1): 11, doi:10.1088/0004-637X/771/1/11, Bibcode: 2013ApJ...771...11A
- ↑ Mills, Sean M. et al. (2019). "Long-period Giant Companions to Three Compact, Multiplanet Systems". The Astronomical Journal 157 (4): 145. doi:10.3847/1538-3881/ab0899. Bibcode: 2019AJ....157..145M.
Coordinates: 
19h 06m 33.2204s, +39° 29′ 16.321″
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