HD 164427 is a star in Telescopium constellation with a brown dwarf companion discovered in 2001 taking place in Australia.
HD 164427 b is a brown dwarf with a minimum mass of 46 times that of Jupiter. It orbits at nearly half an astronomical unit or Earth-to-Sun distance away from its star (HD 164427). The angular separation between a brown dwarf and a yellow dwarf as viewed from Earth is 11.76 Milliarcseconds. It takes 108.55 Earth days to orbit eccentrically around HD 164427. It has a very high semi-amplitude of almost 1400 m/s, because this is a very massive object which exerts strong gravitational pull on its tugging star.
* Tinney et al.; Butler, R. Paul; Marcy, Geoffrey W.; Jones, Hugh R. A.; Penny, Alan J.; Vogt, Steven S.; Apps, Kevin; Henry, Gregory W. (2001). "First Results from the Anglo-Australian Planet Search: A Brown Dwarf Candidate and a 51 Peg-like Planet". The Astrophysical Journal 551 (1): 507–511. doi:10.1086/320097. http://adsabs.harvard.edu/abs/2001ApJ...551..507T. Retrieved December 21, 2007.
* "HD 164427 -- Yellow Subgiant". Extrasolar Visions. http://www.extrasolar.net/startour.asp?StarCatId=normal&StarId=129. Retrieved December 21, 2007.
* "HD 164427 B – Brown dwarf". Extrasolar Visions. http://www.extrasolar.net/planettour.asp?StarCatId=normal&PlanetId=155. Retrieved December 21, 2007.
* "NLTT 45831 -- High proper-motion Star". SIMBAD. http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=HD+164427&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id. Retrieved December 21, 2007.