WASP-4 is a
G-type main sequence star
A G-type main-sequence star (Spectral type: G-V), also often, and imprecisely called a yellow dwarf, or G star, is a main-sequence star (luminosity class V) of spectral type G. Such a star has about 0.9 to 1.1 solar masses and an effective temper ...
approximately 891
light-years away in the
constellation of
Phoenix
Phoenix most often refers to:
* Phoenix (mythology), a legendary bird from ancient Greek folklore
* Phoenix, Arizona, a city in the United States
Phoenix may also refer to:
Mythology
Greek mythological figures
* Phoenix (son of Amyntor), a ...
.
Despite its advanced age, the star is rotating rapidly, being spun up by the tides raised by a giant planet on close orbit.
Planetary system
In 2007 the
extrasolar planet
An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not recognized as such. The first confirmation of detection occurred in 1992. A different planet, init ...
WASP-4b
WASP-4b is an extrasolar planet approximately 891 light-years away in the constellation of Phoenix.
Discovery
The planet was the discovered by the Wide Angle Search for Planets team using images taken with the SuperWASP-South projects eight wid ...
was discovered orbiting this star. With an orbital period of just 1.3 days it is classified as a
hot Jupiter
Hot Jupiters (sometimes called hot Saturns) are a class of gas giant exoplanets that are inferred to be physically similar to Jupiter but that have very short orbital periods (). The close proximity to their stars and high surface-atmosphere tem ...
.
The planetary orbit is subject to rapid decay, with decay timescale of 15.77 million years. Another
superjovian
A super-Jupiter is a gas giant exoplanet that is more massive than the planet Jupiter. For example, companions at the planet–brown dwarf borderline have been called super-Jupiters, such as around the star Kappa Andromedae.
By 2011 there were ...
planet in the system is suspected.
[
]
See also
* SuperWASP
WASP or Wide Angle Search for Planets is an international consortium of several academic organisations performing an ultra-wide angle search for exoplanets using transit photometry. The array of robotic telescopes aims to survey the entire sky, ...
* List of extrasolar planets
These are lists of exoplanets. Most of these were discovered by the Kepler space telescope. There are an additional 2,054 potential exoplanets from Kepler's first mission yet to be confirmed, as well as 978 from its " Second Light" mission and ...
References
External links
*
*
Phoenix (constellation)
G-type main-sequence stars
Planetary systems with one confirmed planet
Planetary transit variables
4
J23341508-4203411
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