description Mu Arae e Overview
Mu Arae e is an outer planet in the multi-planet system surrounding Mu Arae, a Sun-like star roughly 50 light-years from Earth. It has a mass in the Jupiter range and was identified from changes in the star's radial velocity. The planet was reported as part of the system's early four-planet interpretation in 2004. Its outer orbit distinguishes it from the shorter-period planets closer to Mu Arae.
help Mu Arae e FAQ
What is Mu Arae e's alternate name?
Mu Arae e is also known as HD 160691 e and was given the proper name Sancho in the IAU NameExoWorlds process. The name refers to Sancho Panza from Don Quixote.
How long is a year on Mu Arae e?
It takes about 4,206 days, or 11.5 years, to orbit Mu Arae. Its semimajor axis is about 5.24 AU, roughly Jupiter-like in scale.
How was Mu Arae e detected?
It was inferred from long-term radial-velocity measurements of Mu Arae, not by a transit image. The long period meant early orbital estimates were revised as more observations accumulated, with the four-planet model published in 2006.
Is Mu Arae e a gas giant?
Yes, its minimum mass is about 1.8 Jupiter masses, so it is classified as a gas giant. It is the outer planet in the four-planet Mu Arae system and orbits far beyond the 9.64-day inner companion Mu Arae c.
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