WASP-189 b (also known as HD 133112 b) is an
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 ...
that has an orbital period around its host star,
WASP
A wasp is any insect of the narrow-waisted suborder Apocrita of the order Hymenoptera which is neither a bee nor an ant; this excludes the broad-waisted sawflies (Symphyta), which look somewhat like wasps, but are in a separate suborder. Th ...
-189 (HD 133112), of less than three earth days, and is about 322 light-years away in the
Libra constellation
Libra is a constellation of the zodiac and is located in the Southern celestial hemisphere. Its name is Latin for weighing scales. Its old astronomical symbol is (♎︎). It is fairly faint, with no first magnitude stars, and lies between Vi ...
.
It was first discovered in 2018, and was observed in 2020 by
CHEOPS
Khufu or Cheops was an ancient Egyptian monarch who was the second pharaoh of the Fourth Dynasty, in the first half of the Old Kingdom period (26th century BC). Khufu succeeded his father Sneferu as king. He is generally accepted as having ...
.
Discovery and observations
WASP-189 b was first discovered in 2018. In 2020, astronomers used CHEOPS to observe it. Based on a passage behind its host star (
occultation
An occultation is an event that occurs when one object is hidden from the observer by another object that passes between them. The term is often used in astronomy, but can also refer to any situation in which an object in the foreground blocks ...
) the planet's brightness could be measured and the temperature was estimated to be . Based on a passage in front of its host star (
transit
Transit may refer to:
Arts and entertainment Film
* ''Transit'' (1979 film), a 1979 Israeli film
* ''Transit'' (2005 film), a film produced by MTV and Staying-Alive about four people in countries in the world
* ''Transit'' (2006 film), a 2006 ...
) the radius is 1.6 times the radius of
Jupiter
Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a mass more than two and a half times that of all the other planets in the Solar System combined, but ...
.
Its atmosphere contains titanium oxide, and also contains metals such as chromium, magnesium, vanadium and manganese.
See also
*
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 temp ...
*
Wide Angle Search for Planets
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, s ...
References
External links
Planet WASP-189 b
Exoplanets discovered by WASP
Exoplanets discovered in 2018
Giant planets
Hot Jupiters
Libra (constellation)
Transiting exoplanets
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