BD-08°2823 b is an extrasolar planet

Extrasolar planet

An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars...

 which orbits the K-type main sequence

Main sequence

The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung–Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell...

 star

Star

A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...

 BD-08°2823

BD-08°2823

BD-08°2823 is a 9.86 magnitude K-type main sequence star located approximately 137 light years away in the constellation Sextans. This star is smaller, cooler, fainter, and less massive than our Sun. Also its metal content is six-sevenths as much as the Sun. In 2009, two gas giant planets were...

, located approximately 137 light years away in the constellation

Constellation

In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....

 Sextans

Sextans

Sextans is a minor equatorial constellation which was introduced in 1687 by Johannes Hevelius. Its name is Latin for the astronomical sextant, an instrument that Hevelius made frequent use of in his observations.-Notable features:...

. This planet has at least 14 times the mass of Earth

Earth

Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

 and takes four-fifths of a week to orbit the star at a semimajor axis of 0.056 AU

Astronomical unit

An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance....

. This planet is classified as a hot Neptune

Hot Neptune

A hot Neptune is an extrasolar planet in an orbit close to its star , with a mass similar to that of Uranus or Neptune. Recent observations have revealed a larger potential population of hot Neptunes than previously thought...

. This planet was detected by HARPS on October 19, 2009, together with 29 other planets, including BD-08°2823 c

BD-08°2823 c

BD-08°2823 c is an extrasolar planet which orbits the K-type main sequence star BD-08°2823, located approximately 137 light years away in the constellation Sextans. This planet has at least one-thirds the mass of Jupiter and takes 7.8 months to orbit the star at a semimajor axis of 0.68 AU...

.