Epsilon Eridani


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Epsilon Eridani

(Ɛ Eri) An orange-red main-sequence star located in the constellation Eridanus at a distance of 3.2 parsecs. It is a young star (about 500 million to a billion years old) and has between 75% and 85% of the Sun's mass and size but only 27% to 35% of its luminosity. In 1998, astronomers announced the detection of a cool dusty ring around the star, encircling it at a distance of between 35 and 75 AU. This is thought to be a belt of rocky and icy bodies equivalent to the Solar System's Edgworth–Kuiper Belt. In 2000, researchers announced the detection of a giant planet orbiting Epsilon Eridani at a mean distance of about 3.3 AU in an elliptical orbit (eccentricity: 0.6) with a period of 6.8 years. The planet is estimated to have a mass equal to about 1.2 times that of Jupiter. The existence of a second and smaller planet orbiting about 40 AU out from the star has been inferred from disturbances in the structure of the dust ring but remains unconfirmed. mv : 3.73; spectral type: K2 V.
References in periodicals archive ?
Marengo said the findings are important because they confirm epsilon Eridani is a good model of the early days of our solar system and can provide hints at how our solar system evolved.
Having made an emergency landing in a foreign world - called Epsilon Eridani B - the characters have a long journey ahead of them as they struggle to stay alive.
The team even talked about two exoplanets where they would expect to find exomoons in the future: Gliese 876b, which is about 15 light years away and Epsilon Eridani b, which is about 10.
This time the Western Republic is about to launch Columbia, a well advanced spaceship than its Apollo predecessor, to embark on an exploration of Epsilon Eridani.
There was no detection of exoplanets orbiting Epsilon Eridani and data from HD128311 was very noisy.
Only radio static has been heard on that spectrum of the galactic radio network ever since Frank Drake pointed an eighty-five-foot radio dish based at the National Radio Astronomy Observatory in Green Bank at Epsilon Eridani and Tau Ceti--two relatively nearby Sun-like stars--back in 1960.
In the annals of planethood, astronomers consider the star Epsilon Eridani a member of the fabulous four.
Epsilon Eridani looks very like a much younger version of our own star system, say astronomers.
At this command the Enterprise flashes into warp speed and sails with incredible velocity toward Epsilon Eridani.
The body orbits the young star Epsilon Eridani just 10.
A TEAM OF ASTRONOMERS has determined that Epsilon Eridani b, at 10.
Although it lies close to Earth, the star Epsilon Eridani could well be overlooked by a casual observer.