WASP-47

WASP-47
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 22h 04m 48.7262s[1]
Declination −12° 01′ 07.999″[1]
Apparent magnitude (V) 11.986
Characteristics
Evolutionary stage Main sequence
Spectral type G9V
Astrometry
Radial velocity (Rv)−26.56(47)[1] km/s
Proper motion (μ) RA: 15.074(20) mas/yr[1]
Dec.: −41.467(20) mas/yr[1]
Parallax (π)3.7010 ± 0.0201 mas[1]
Distance881 ± 5 ly
(270 ± 1 pc)
Details
Mass1.11 (± 0.05) M☉
Radius1.16 (± 0.26) R☉
Luminosity~1.16 L☉
Surface gravity (log g)4.354 (± 0.086) cgs
Temperature5576 (± 68) K
Metallicity [Fe/H]+0.36 (± 0.05) dex
Rotation32.5±3.9 d[2]
Age6.5 +2.6
−1.2 Gyr
Other designations
Gaia DR3 2613413008919918976, K2-23, EPIC 206103150, 2MASS J22044873-1201079, WISE J220448.74-120108.4[3]
Database references
SIMBADdata

WASP-47 is a star similar in size and brightness to the Sun about 881 light-years away in the constellation Aquarius. It lies within the Kepler K2 campaign field 3. It was first noticed to have a hot Jupiter exoplanet orbiting every 4 days in 2012 by the Wide Angle Search for Planets (WASP) team.[4] While it was thought to be a typical hot Jupiter system, three more planets were found in 2015:[5][6] an outer gas giant within the habitable zone, a hot Neptune exterior to the hot Jupiter's orbit and a super-Earth interior to the hot Jupiter's orbit. WASP-47 is the only planetary system known to have both planets near the hot Jupiter and another planet much further out.[7]

  1. ^ a b c d e Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  2. ^ Bryant, Edward M.; Bayliss, Daniel (2022), "Revisiting WASP-47 with ESPRESSO and TESS", The Astronomical Journal, 163 (5): 197, arXiv:2202.12747, Bibcode:2022AJ....163..197B, doi:10.3847/1538-3881/ac58ff, S2CID 247154656
  3. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Hellier2012 was invoked but never defined (see the help page).
  5. ^ Becker, Juliette C.; Vanderburg, Andrew; Adams, Fred C.; Rappaport, Saul A.; Schwengeler, Hans Martin (2015-10-12). "Wasp-47: A Hot Jupiter System with Two Additional Planets Discovered by K2". The Astrophysical Journal. 812 (2): L18. arXiv:1508.02411. Bibcode:2015ApJ...812L..18B. doi:10.1088/2041-8205/812/2/L18. ISSN 2041-8213. S2CID 14681933.
  6. ^ Cite error: The named reference Neveu-VanMalle2016 was invoked but never defined (see the help page).
  7. ^ "WASP-47". exoplanetarchive.ipac.caltech.edu.