alf Tau Alpha Tauri Aldebaran 04 35 55.20 +16 30 35.1 20.43 alf Tau AB Aldebaran AB Alpha Tauri α Tau α Tauri 87 Tau 87 Tauri Gliese 171.1 GJ 171.1 GJ 9159 WDS J04359+1631 BU 550 31.60 645 113 alf Tau Aldebaran alf Tau A Alpha Tauri A α Tau A α Tauri A Aldebaran A 87 Tau A 87 Tauri A HR 1457 HD 29139 HIP 21421 TYC 1266-1416-1 BD+16 629 PPM 120061 Gliese 171.1 A GJ 171.1 A GJ 9159 A WDS J04359+1631 A BU 550 A 1.13 45.1 0.99 -0.27 K5 III 6.6 4055 alf Tau b Aldebaran b alf Tau A b Alpha Tauri A b α Tau A b α Tauri A b 87 Tau A b 87 Tauri A b HR 1457 b HD 29139 b HIP 21421 b TYC 1266-1416-1 b BD+16 629 b PPM 120061 b Controversial 6.47 628.96 287 2451297.0 1.46 0.10 Investigations of long-period radial velocity in Aldebaran first reported over 20 years ago and further photometric investigations provide further evidence of a planetary companion to Aldebaran. RV 15/11/17 2015 Planets in binary systems, S-type alf Tau B Alpha Tauri B Aldebaran B α Tau B α Tauri B 87 Tau B 87 Tauri B Gliese 171.1 B GJ 171.1 B GJ 9159 B BD+16 629 B WDS J04359+1631 B BU 550B 13.6 M2V Taurus