HD 4747B

HD 4747B is a brown dwarf in the star system HD 4747 . The companion was discovered in 1996. The distance to the central star is 11.3 AU and the orbital period is 37.9 years. The orbit is very elliptical and has an eccentricity of e = 0.74. The mass of Jupiter is 60 and the age of the brown dwarfs is estimated to be 3.3 billion years.

Individual evidence

^ Tilmann Althaus: A brown dwarf as a reference star. For around 18 years, a team of researchers observed the star HD 4747, which is orbited by a brown dwarf. From this, the researchers were able to derive important properties of the companion, which are suitable for directly checking the current theories on the development of this class of celestial bodies. In: Spectrum of Science. April 7, 2016, accessed April 9, 2016 .

[1] Tilmann Althaus: A brown dwarf as a reference star. For around 18 years, a team of researchers observed the star HD 4747, which is orbited by a brown dwarf. From this, the researchers were able to derive important properties of the companion, which are suitable for directly checking the current theories on the development of this class of celestial bodies. In: Spectrum of Science. April 7, 2016, accessed April 9, 2016 .