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Algieba b

Algieba A b, Gamma Leonis b, Gamma¹ Leonis b

Extrasolar Planet in Leo

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Proper Name	None
Designations	Algieba b, Algieba A b, Gamma Leonis b, Gamma¹ Leonis b
Classification	Gas Giant
Orbital Period	428.5 days
Mean Distance from Algieba	178 million km 1.19 AU
Mass	8.8 x Jupiter
Diameter	Not known
Temperature	Not known
Parent star	Algieba (Gamma¹ Leonis), orange giant in Leo
Other planets in this system	Algieba c (Gamma¹ Leonis c), unconfirmed gas giant
Notes	This gas giant planet has an extraordinarily high mass, nearly nine times that of Jupiter. It orbits Algieba A, an orange giant star that forms part of the binary Algieba system in Leo, at a distance only slightly greater than that from the Sun to Earth.

The orbits of planets in the Algieba A system

The massive planet Algieba b follows an orbit around its orange parent star that is comparable in distance to that of Earth from the Sun, though rather more eccentric. There is potentially a less massive second planet in the system, designated Algieba c, though the existence of this planet has yet be confirmed. The central star shown here, Algieba A, is part of a binary system, with a companion that also has a highly eccentric orbit, but averages a distance of about 170 AU from the primary (or about 140 times the distance of the planet Algieba b from its star).

Imagery provided by Aladin sky atlas

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