KELT-4Ab 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 orbits the star KELT-4A, in the star system KELT-4. The
planet
A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a you ...
is approximately away
in the
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
of
Leo.
The planet was discovered by the
Kilodegree Extremely Little Telescope
The Kilodegree Extremely Little Telescope (or KELT) is an astronomical observation system formed by two robotic telescopes that are conducting a survey for transiting exoplanets around bright stars. The project is jointly administered by member ...
(KELT).
Planet
The exoplanet was discovered by
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 ...
and is 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 temp ...
planet orbiting a star in a
triple star system
A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction. A large group of stars bound by gravitation is generally called a ''star cluster'' or ''galaxy'', although, broadly speaking, ...
, KELT-4. It is the fourth planet found in such a system.
As KELT-4A is the brightest host (
V~10) of a Hot Jupiter in a hierarchical triple stellar system found so far researchers expect it may be useful in learning more about inflated planets.
Star system
KELT-4 is a
triple star system
A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction. A large group of stars bound by gravitation is generally called a ''star cluster'' or ''galaxy'', although, broadly speaking, ...
. KELT-4BC is a
binary star system
A binary star is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often resolved using a telescope as separate stars, in wh ...
subcomponent of the triple, away from KELT-4A and the projected separation between KELT-4B and KELT-4C is .
See also
*
Gliese 667 Cc
Gliese 667 Cc (also known as GJ 667Cc, HR 6426Cc, or HD 156384Cc) is an exoplanet orbiting within the habitable zone of the red dwarf star Gliese 667 C, which is a member of the Gliese 667 triple star system, approximately away in the constella ...
, a planet in a triple star system
*
KELT-2Ab
KELT-2Ab is an extrasolar planet that orbits the star KELT-2A approximately 440 light-years away in the constellation of Auriga. It was discovered by the KELT-North survey via the transit method, so both its mass and radius are known quite precis ...
, a previous planet discovered by the KELT survey, in a binary system
*
KELT KELT may refer to:
*A Salmonid that has spawned and did not die as a result
*An alternative spelling of Celt
*KELT (FM), call letters of an FM radio station located in Encinal, Texas
*KELT, the former call letters of an FM radio station located in ...
References
External links
KELT-North survey websiteOpen Exoplanet Catalogue Entry
Hot Jupiters
Transiting exoplanets
Exoplanets discovered in 2015
Exoplanets discovered by KELT
Leo (constellation)
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