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

(star,disk,exoplanets)
http://en.wikipedia.org/wiki/HR_8799
RedshiftParsecs
/Distance
Lightyears
/Lookback Years
  
~040pc129lyHR 8799
Coordinates:HR 8799
J230728.7150+210803.302

Referenced by:
direct imaging

index