HD 188753 - Stellar Components

Stellar Components

The primary star, HD 188753 A, is similar to the Sun with a mass only 6% larger and a stellar classification of G8V. Orbiting this primary at a distance of 12.3 AU is a pair of smaller stars that orbit each other with a period of 156.0 ± 0.1 days, a semi-major axis of 0.67 AU, and eccentricity of 0.1 ± 0.03. The pair have a estimated masses of 0.96 and 0.67 solar masses. They orbit the primary with a period of about 25.7 years and an orbital eccentricity of about 0.50. The periastron distance of this orbit is 6.2 AU.

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Gliese 86 - Stellar Components
... Gliese 86 B is a white dwarf star located around 21 AU from the primary star, making the Gliese 86 system one of the tightest binaries known to host an extrasolar planet ... It was discovered in 2001 and initially suspected to be a brown dwarf, but high contrast observations in 2005 suggested that the object is probably a white dwarf star, as its spectrum does not exhibit molecular absorption features which are typical of brown dwarfs ...

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