Kepler-26
Star in the constellation Lyra
From Wikipedia, the free encyclopedia
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 | |
| Evolutionary stage | main sequence[2] |
| 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 | |
| KOI-250, KIC 9757613, 2MASS J18594583+4633595, Gaia DR2 2107317358665730688 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| KIC | data |
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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, 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🜨 |