Kepler-7
Kepler-7 is a star located in the constellation Lyra in the field of view of the Kepler Mission, a NASA operation in search of Earth-like planets. It is home to the fourth of the first five planets that Kepler discovered; this planet, a Jupiter-size gas giant named Kepler-7b, is as light as styrofoam. The star itself is more massive than the Sun, and is nearly twice the Sun's radius. It is also slightly metal-rich, a major factor in the formation of planetary systems. Kepler-7's planet was presented on January 4, 2010 at a meeting of the American Astronomical Society.
Kepler-7-Sun comparison | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 14m 19.5623s |
| Declination | +41° 05′ 23.365″ |
| Apparent magnitude (V) | 13.005±0.039 |
| Characteristics | |
| Spectral type | G0 |
| Apparent magnitude (J) | 11.833±0.020 |
| Apparent magnitude (H) | 11.601±0.022 |
| Apparent magnitude (K) | 11.535±0.020 |
| Apparent magnitude (B) | 13.620±0.029 |
| Astrometry | |
| Radial velocity (Rv) | +0.40 ± 0.10 km/s |
| Proper motion (μ) | RA: −2.956±0.050 mas/yr Dec.: −20.949±0.042 mas/yr |
| Parallax (π) | 1.0554 ± 0.0235 mas |
| Distance | 3,090 ± 70 ly (950 ± 20 pc) |
| Details | |
| Mass | 1.347+0.072 −0.054 M☉ |
| Radius | 1.843+0.048 −0.066 R☉ |
| Luminosity | 4.15+0.63 −0.54 L☉ |
| Surface gravity (log g) | 3.98 ± 0.10 cgs |
| Temperature | 5933 ± 44 K |
| Metallicity [Fe/H] | +0.11 ± 0.03 dex |
| Rotational velocity (v sin i) | 4.2 ± 0.5 km/s |
| Age | 3.3 ± 0.4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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