Best Outer
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TRAPPIST-1h is the outermost of the seven TRAPPIST-1 planets, announced in 2017; it likely receives insufficient stellar flux for liquid surface water without a strong greenhouse effect.
HD 10180 h is a Neptune-mass exoplanet orbiting HD 10180 about 127 light-years away, the outermost confirmed planet in a multi-planet system discovered in 2010 using the HARPS spectrograph.
The fourth planet in the Upsilon Andromedae system, discovered in 2010, a massive giant whose orbit is highly inclined relative to planet d's orbital plane.
Mu Arae e is a Jupiter-mass exoplanet orbiting the star Mu Arae about 50 light-years away, the outermost of four planets in the system, confirmed through radial-velocity measurements in 2004.
The outermost known planet of the Gliese 876 system, discovered in 2010, a Jupiter-mass world completing one orbit every approximately 124 days.
Wolf 1061 d is the outermost planet in the Wolf 1061 system (~14 ly), discovered in 2015 as a super-Earth orbiting just outside the star's habitable zone.
Outer gas giant in the mu Arae (HD 160691) four-planet system, detected via radial velocity with a multi-year orbital period around this nearby G-type star.
HD 168443 c is a very massive companion (~17 Jupiter masses) orbiting HD 168443 on a ~4.8-year period, announced in 2001; its mass places it at the planet-brown-dwarf boundary.
A proposed outer giant planet in the 47 Ursae Majoris system announced in 2010, though its existence remains debated due to limited observational baseline.
Outer companion in the HD 12661 two-planet system, a gas giant with a multi-year orbital period discovered alongside HD 12661 b via radial velocity.
Outer gas giant companion in the HD 108874 system, discovered via radial velocity with a longer orbital period than the inner planet HD 108874 b.
Second gas giant in the HD 142 system, detected through continued radial velocity monitoring with a longer orbital period than the inner planet HD 142 b.
HIP 14810 d is a super-Earth exoplanet orbiting the Sun-like star HIP 14810 about 170 light-years away, announced in 2009 as part of a three-planet system found via radial-velocity measurements.
GJ 849 c is a second Jupiter-mass planet in the GJ 849 system, announced in 2009; together with GJ 849 b, it made this red dwarf the first known to host two Jupiter-like companions.
