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 15.06s[1]
Declination −42° 03′ 41.1″[1]
Apparent magnitude (V) 12.5[2]
Characteristics
Spectral type G7V[1]
Apparent magnitude (V) 13.0[1]
Apparent magnitude (R) 11.9[1]
Variable type V*(1SWASP)[1]
Astrometry
Distance 1000 ± 160 ly
(300 ± 50[2] pc)
Details
Mass 0.85 +0.11-0.07[3] M
Radius 0.87 +0.04-0.03[3] R
Surface gravity (log g) 4.45+0.016
−0.029
[2] cgs
Temperature 5500 ± 150[2] K
Metallicity [M/H]=0.0 ± 0.2[2]
Other designations
1SWASP J233415.06-420341.1, USNO-B1.0 0479-00948995[1]
Database references
SIMBAD data
Extrasolar Planets
Encyclopaedia
data

WASP-4 is a G-type main sequence star approximately 1,000 light-years away in the constellation of Phoenix.[1]

Planetary system[edit]

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

The WASP-4 system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
WASP-4b 1.237 ± 0.064[4] 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″