WASP-4

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WASP-4
Planet WASP-4.png

Artistic rendering of WASP-4 b
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Phoenix
Right ascension 23h 34m 15.0869s[1]
Declination −42° 03′ 41.053″[1]
Apparent magnitude (V) 12.5[2]
Characteristics
Spectral type G7V[3]
Apparent magnitude (V) 13.0[3]
Apparent magnitude (R) 11.9[3]
Variable type V*(1SWASP)[3]
Astrometry
Proper motion (μ) RA: 9.084±0.969 mas/yr
Dec.: −87.278±1.699 mas/yr
Parallax (π)3.63 ± 0.70[1] mas
Distanceapprox. 900 ly
(approx. 280 pc)
Details
Mass0.85 +0.11-0.07[4] M
Radius0.87 +0.04-0.03[4] R
Surface gravity (log g)4.45+0.016
−0.029
[2] cgs
Temperature5500 ± 150[2] K
Metallicity[M/H]=0.0 ± 0.2[2]
Other designations
1SWASP J233415.06-420341.1, USNO-B1.0 0479-00948995[3]
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia
data

WASP-4 is a G-type main sequence star approximately 900 light-years away in the constellation of Phoenix.[3]

Planetary system[edit]

In 2007, an extrasolar planet, WASP-4b, was discovered orbiting this star.[2]

The WASP-4 planetary system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
WASP-4b 1.237 ± 0.064[5] MJ 0.0230±0.001 1.3382282±0.000003 0

See also[edit]

References[edit]

External links[edit]

Coordinates: Sky map 23h 34m 15.06s, −42° 03′ 41.1″