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 |
Characteristics | |
Evolutionary stage | Subgiant |
Spectral type | F6IV |
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 M☉ |
Radius | 1.41 R☉ |
Temperature | 6211 K |
Metallicity [Fe/H] | +0.17 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 |
KIC | data |
Kepler-65 is a subgiant star slightly more massive than the Sun and has at least four planets.
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 ° | — |