Kepler-65
F-type subgiant star in the constellation Lyra
From Wikipedia, the free encyclopedia
Kepler-65 is a subgiant star slightly more massive than the Sun and has at least four planets.
Right ascension19h 14m 45.2916s[2]
Declination+41° 09′ 04.210″[2]
Apparentmagnitude(V)11.018[citation needed]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 19h 14m 45.2916s[2] |
| Declination | +41° 09′ 04.210″[2] |
| Apparent magnitude (V) | 11.018[citation needed] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | F6IV[citation needed] |
| Astrometry | |
| Proper motion (μ) | RA: 1.256(14) mas/yr[2] Dec.: −14.388(12) mas/yr[2] |
| Parallax (π) | 3.3184±0.0108 mas[2] |
| Distance | 983 ± 3 ly (301.4 ± 1.0 pc) |
| Details | |
| Mass | 1.25[citation needed] M☉ |
| Radius | 1.41[citation needed] R☉ |
| Temperature | 6211[citation needed] K |
| Metallicity [Fe/H] | +0.17[citation needed] dex |
| Rotation | 7.911±0.155 days[3] |
| Other designations | |
| KOI-85, KIC 5866724, TYC 3125-976-1, GSC 03125-00976, 2MASS J19144528+4109042[4] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| KIC | data |
Planetary system
Three transiting planets were announced in 2013. A fourth non-transiting planet was discovered using radial velocity measurements in 2019.[5] The first three planets orbit very close to their star. Initial follow-up radial velocity measurements provided data too noisy to constrain the mass of planets.[6] Follow-up transit-timing variation analysis helped to measure the mass of Kepler-65d which revealed that it has significantly lower density than Earth.[7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.4+2.4 −1.6 M🜨 |
0.035 | 2.1549209+0.0000086 −0.0000074 |
0.028+0.031 −0.02 |
92.2+1.3 −1.4° |
1.444+0.037 −0.031 R🜨 |
| c | 5.4±1.7 M🜨 | 0.068 | 5.859697+0.000093 −0.000099 |
0.02+0.022 −0.013 |
92.33+0.29 −0.26° |
2.623+0.066 −0.056 R🜨 |
| d | 4.14+0.79 −0.80 M🜨 |
0.084 | 8.13167+0.00024 −0.00021 |
0.014+0.016 −0.010 |
92.35+0.18 −0.16° |
1.587+0.040 −0.035 R🜨 |
| e | 200+200 −50 M🜨 |
— | 258.8+1.5 −1.3 |
0.283+0.064 −0.071 |
127.0+27.0 −25.0° |
— |