Kepler-17
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus[1] |
| Right ascension | 19h 53m 34.8643s[2] |
| Declination | +47° 48′ 54.050″[2] |
| Apparent magnitude (V) | 14.0[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G2V[3] |
| Astrometry | |
| Proper motion (μ) | RA: −3.811(17) mas/yr[2] Dec.: −6.339(19) mas/yr[2] |
| Parallax (π) | 1.4115±0.0151 mas[2] |
| Distance | 2,310 ± 20 ly (708 ± 8 pc) |
| Details[3] | |
| Mass | 1.16±0.06 M☉ |
| Radius | 1.05±0.03 R☉ |
| Temperature | 5781±85 K |
| Metallicity [Fe/H] | 0.26 (± 0.1) dex |
| Rotation | 12.159±0.029 days[4] |
| Rotational velocity (v sin i) | 4.2±0.5[5] km/s |
| Age | 3.0±1.6[6] Gyr |
| Other designations | |
| Gaia DR2 2086449761846310784, KOI-203, KIC 10619192, 2MASS J19533486+4748540[5] | |
| Database references | |
| SIMBAD | data |
| KIC | data |
Kepler-17 is a main-sequence yellow dwarf star that is much more active than the Sun with starspots covering roughly 6% of its surface.[7] Starspots are long-lived, with at least one persisting for 1400 days.[8]
