Kepler-17

Kepler-17
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 53m 34.8643s[1]
Declination +47° 48′ 54.050″[1]
Apparent magnitude (V) 14.0[2]
Astrometry
Proper motion (μ) RA: −3.811(17) mas/yr[1]
Dec.: −6.339(19) mas/yr[1]
Parallax (π)1.4115 ± 0.0151 mas[1]
Distance2,310 ± 20 ly
(708 ± 8 pc)
Characteristics
Spectral type G2V[2]
Details[2]
Mass1.16±0.06 M☉
Radius1.05±0.03 R☉
Temperature5781±85 K
Metallicity [Fe/H]0.26 (± 0.1) dex
Rotation12.159±0.029 days[3]
Rotational velocity (v sin i)4.2±0.5[4] km/s
Age3.0±1.6[5] Gyr
Other designations
Gaia DR2 2086449761846310784, KOI-203, KIC 10619192, 2MASS J19533486+4748540[4]
Database references
SIMBADdata
KICdata

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.[6] Starspots are long-lived, with at least one persisting for 1400 days.[7]

  1. ^ a b c d Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ a b c "Notes on Kepler-17 b". Extrasolar Planets Encyclopaedia. Retrieved 15 January 2017.
  3. ^ Cite error: The named reference McQuillan2013 was invoked but never defined (see the help page).
  4. ^ a b "Kepler-17". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 January 2017.
  5. ^ Morris, Brett M.; Agol, Eric; Hebb, Leslie; Hawley, Suzanne L. (2018), "Robust Transiting Exoplanet Radii in the Presence of Starspots from Ingress and Egress Durations", The Astronomical Journal, 156 (3): 91, arXiv:1807.04886, Bibcode:2018AJ....156...91M, doi:10.3847/1538-3881/aad3b7, S2CID 119420137
  6. ^ Cite error: The named reference Valio2017 was invoked but never defined (see the help page).
  7. ^ Lanza, A. F.; Netto, Y.; Bonomo, A. S.; Parviainen, H.; Valio, A.; Aigrain, S. (2019), "Stellar activity and rotation of the planet host Kepler-17 from long-term space-borne photometry", Astronomy & Astrophysics, 626: A38, arXiv:1904.04489, Bibcode:2019A&A...626A..38L, doi:10.1051/0004-6361/201833894, S2CID 104292264