BD+20 2457 is an orange K-type dwarf (about 2.80 solar masses, 4,137 K, 49.0 solar radii), 1,540 light-years from Earth. BD+20 2457 b is a 21.4-Jupiter-mass companion, with an orbital period of 1.04 years, at 1.450 AU from its star, on an eccentric orbit (e ≈ 0.15), discovered in 2009 via radial velocity. BD+20 2457 c is a 12.5-Jupiter-mass companion, with an orbital period of 1.70 years, at 2.010 AU from its star, on an eccentric orbit (e ≈ 0.18), discovered in 2009 via radial velocity.

BD+20 2457 - System

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