WASP-4

WASP-4

Artistic rendering of WASP-4 b
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Phoenix[1]
Right ascension 23h 34m 15.0857s[2]
Declination −42° 03′ 41.048″[2]
Apparent magnitude (V) 12.468±0.025[3]
Characteristics
Evolutionary stage Main sequence
Spectral type G7V[4]
Apparent magnitude (V) 12.468±0.025[3]
Apparent magnitude (B) 13.216±0.020[3]
Variable type Planetary transit variable[4]
Astrometry
Radial velocity (Rv)57.61±0.76[2] km/s
Proper motion (μ) RA: 9.950(12) mas/yr[2]
Dec.: −87.620(10) mas/yr[2]
Parallax (π)3.6623 ± 0.0147 mas[2]
Distance891 ± 4 ly
(273 ± 1 pc)
Details[5]
Mass0.89±0.01 M☉
Radius0.920±0.060 R☉
Surface gravity (log g)4.484+0.037
−0.047[6] cgs
Temperature5436±34 K
Metallicity [Fe/H]−0.050±0.040 dex
Rotation22.2±3.3 d
Rotational velocity (v sin i)2.2+0.6
−1.0 km/s
Age7.0±2.9 Gyr
Other designations
1SWASP J233415.06-420341.1, TOI-232, TIC 402026209, WASP-4, TYC 8017-108-1, 2MASS J23341508-4203411[7]
Database references
SIMBADdata

WASP-4 is a G-type main-sequence star approximately 891 light-years away in the constellation of Phoenix.[4][1][2] Despite its advanced age, the star is rotating rapidly, being spun up by the tides raised by a giant planet on a close orbit.[8]

  1. ^ a b Cite error: The named reference Roman1987 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference APASS DR9 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Wilson2008 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Bonomo2017 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Dragomir2011 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Maxted2015 was invoked but never defined (see the help page).