Kepler-69
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Star Kepler-69 |
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| Comparison of the Kepler 69 system with the solar system | |||
| AladinLite | |||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | swan | ||
| Right ascension | 19 h 33 m 2.6 s | ||
| declination | + 44 ° 52 ′ 8 ″ | ||
| Apparent brightness | 13.7 mag | ||
| Typing | |||
| Known exoplanets | 2 | ||
| Spectral class | G | ||
| Astrometry | |||
| distance | approx. 2700 ly | ||
| Physical Properties | |||
| Dimensions | 0.81 ± 0.09 M ☉ | ||
| radius | 0.93 ± 0.16 R ☉ | ||
| Effective temperature | 5638 ± 168 K | ||
| Metallicity [Fe / H] | −0.29 ± 0.15 | ||
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Other names and catalog entries |
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Kepler-69 is a Sun-like star of spectral class G in the constellation Swan , 2700 light-years from Earth. It is orbited by at least two exoplanets .
Planetary system
On April 17, 2013, researchers at the Kepler Telescope announced that the star was orbited by two planets. The telescope was able to measure the reduced brightness of the star when the planets pass by in front of their star when viewed from Earth. The mass of the planets could not yet be determined.
The outer planet, Kepler-69c , could be Earth-like and have rocks and liquid water on its surface.
| planet | Mass (earth masses) |
Radius (in earth radii) |
Density (g / cm 3 ) |
Cycle time (days) |
Semi-major axis ( AE ) |
Orbit inclination ( degree ) |
|---|---|---|---|---|---|---|
| b | ? | 2.24 ± 0.40 | ? | 13.7223 | 0.094 ± 0.020 | 89.62 ± 0.40 |
| c | ? | 1.71 ± 0.30 | ? | 242,461 | 0.64 ± 0.13 | 89.85 ± 0.06 |
Individual evidence
- ↑ a b Thomas Barclay, et al .: A super-Earth-sized planet orbiting in or near the habitable zone around Sun-like star . In: arXiv . April 17, 2013. arxiv : 1304.4941v1 .