Giant · 9.5 AU
Saturn
Distance9.5 AU
Mass95 M⊕
Year29.5 yr
Its rings are mostly water ice and span about 280,000 km.
Cassini's radio tracking of Saturn has been used to constrain where Planet Nine could be.
Sources
- Brown & Batygin 2021, The orbit of Planet Nine, AJ 162:219
- JPL: Approximate positions of the planets (Standish, Keplerian elements J2000)
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