Astrophysics (Index)About

HR 8799

(star with four exoplanets)

HR 8799 is a young main sequence star with a debris disk and four giant extra-solar planets. It is one of the first systems where the exoplanets were confirmed by direct imaging and the clearest such view of so much of a planetary system. Characteristics:

planetdist to starradiusmasstemperature
HR 8799 b68 AU1.2 RJ5 MJ870 K
HR 8799 c38 AU1.3 RJ7 MJ1090 K
HR 8799 d24 AU1.2 RJ7 MJ1090 K
HR 8799 e14.5 AU1.2 RJ8 MJ1000 K

(RJ and MJ are Jupiter's radius and mass.)

(star,disk,exoplanets,variable star)
Further reading:
/Lookback Years
~040pc129lyHR 8799
Coordinates:HR 8799

Referenced by pages:
A-type star (A)
direct imaging
Bright Star Catalog (HR)