Kepler-17
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. Starspots are long-lived, with at least one persisting for 1400 days.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 19h 53m 34.8643s |
| Declination | +47° 48′ 54.050″ |
| Apparent magnitude (V) | 14.0 |
| Astrometry | |
| Proper motion (μ) | RA: −3.778±0.032 mas/yr Dec.: −6.365±0.035 mas/yr |
| Parallax (π) | 1.3589 ± 0.0198 mas |
| Distance | 2,400 ± 30 ly (740 ± 10 pc) |
| Characteristics | |
| Spectral type | G2V |
| Details | |
| 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 |
| Rotational velocity (v sin i) | 4.2±0.5 km/s |
| Age | 3.0±1.6 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| KIC | data |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.