Kepler-17

Last updated
Kepler-17
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]

Contents

Planetary system

The Kepler-17 is known to host one superjovian exoplanet, Kepler-17b, in orbit around it. It was discovered by the transit method in 2011. [9]

The Kepler-17 planetary system [9] [10]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 2.45±0.014  MJ 0.02591±0.000371.4857108±2e-07<0.01187.2±0.15° 1.312±0.018  RJ

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 "Notes on Kepler-17 b". Extrasolar Planets Encyclopaedia . Retrieved 15 January 2017.
  4. ↑ McQuillan, A.; Mazeh, T.; Aigrain, S. (2013). "Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators". The Astrophysical Journal Letters. 775 (1). L11. arXiv: 1308.1845 . Bibcode: 2013ApJ...775L..11M . doi: 10.1088/2041-8205/775/1/L11 .
  5. 1 2 "Kepler-17". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 16 January 2017.
  6. ↑ 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
  7. ↑ Valio, Adriana; et al. (2017). "Activity and Rotation of Kepler-17". The Astrophysical Journal. 835 (2). 294. arXiv: 1702.02213 . Bibcode: 2017ApJ...835..294V . doi: 10.3847/1538-4357/835/2/294 .
  8. ↑ 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
  9. 1 2 Désert, Jean-Michel; et al. (2011). "The Hot-Jupiter Kepler-17b: Discovery, Obliquity from Stroboscopic Starspots, and Atmospheric Characterization". The Astrophysical Journal Supplement Series. 197 (1). 14. arXiv: 1107.5750 . Bibcode: 2011ApJS..197...14D . doi: 10.1088/0067-0049/197/1/14 .
  10. ↑ Planet Kepler-17 b on exoplanet.eu


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