Kepler-4
Sun-like star in the constellation Draco / From Wikipedia, the free encyclopedia
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Kepler-4 is a sunlike star located about 1626 light-years away in the constellation Draco. It is in the field of view of the Kepler Mission, a NASA operation purposed with finding Earth-like planets. Kepler-4b, a Neptune-sized planet that orbits extremely close to its star, was discovered in its orbit and made public by the Kepler team on January 4, 2010. Kepler-4b was the first discovery by the Kepler satellite, and its confirmation helped to demonstrate the spacecraft's effectiveness.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Draco[1] |
Right ascension | 19h 2m 27.6980s[2] |
Declination | +50° 8′ 08.704″[2] |
Apparent magnitude (V) | 12.7[3] |
Characteristics | |
Spectral type | G0[4] |
Astrometry | |
Proper motion (μ) | RA: 6.127(12) mas/yr[2] Dec.: 4.642(13) mas/yr[2] |
Parallax (π) | 2.0055 ± 0.0103 mas[2] |
Distance | 1,626 ± 8 ly (499 ± 3 pc) |
Details | |
Mass | 1.117+0.021 −0.029[5] M☉ |
Radius | 1.555±0.012[5] R☉ |
Luminosity | 2.505+0.142 −0.124[5] L☉ |
Surface gravity (log g) | 4.102+0.005 −0.004[5] cgs |
Temperature | 5781±76[6] K |
Metallicity [Fe/H] | 0.09±0.10[6] dex |
Age | 6.71+0.77 −0.67[5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
KIC | data |
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