Kepler-68
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 24m 07.7660s[1] |
| Declination | +49° 02′ 24.9282″[1] |
| Apparent magnitude (V) | 10.08[2] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | G1V C |
| Astrometry | |
| Proper motion (μ) | RA: −7.334 ± 0.039[1] mas/yr Dec.: −10.430 ± 0.048[1] mas/yr |
| Parallax (π) | 6.9076 ± 0.0208[1] mas |
| Distance | 472 ± 1 ly (144.8 ± 0.4 pc) |
| Details[3] | |
| Mass | 1.079±0.051 M☉ |
| Radius | 1.243±0.019 R☉ |
| Temperature | 5793±74 K |
| Metallicity [Fe/H] | 0.12 (± 0.074) dex |
| Rotational velocity (v sin i) | 2.4±0.5[4] km/s |
| Age | 6.31+0.84 −0.79 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-68 is a Sun-like main sequence star. It is known to have at least three planets orbiting around it. The outermost planet has a mass similar to Jupiter but orbits within the habitable zone.[5]
High resolution imaging observations of Kepler-68 carried out with the lucky imaging instrument AstraLux on the 2.2m telescope at Calar Alto Observatory detected a wide companion candidate approximately 11 arcseconds away. Comparing these observations to the 2MASS positions shows that the companions proper motion is consistent with it being bound to the Kepler-68 system, but further observations are needed to confirm this conclusion.[6] Eleven arcseconds at the distance of Kepler-68 leads to a sky projected separation of approximately 1600 Astronomical units. A circular orbit at that distance would have a period of roughly 50,000 years.[7]
Planetary system[]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 7.65+1.37 −1.32 M |