The Geneva group has reported two Saturn–mass planets orbiting HD 83443 ( K0V ) with periods of 2.98 and 29.8 d. The two planets have raised interest in their dynamics because of the possible 10:1 orbital resonance and the strong gravitational interactions .
We report precise Doppler measurements of HD 83443 obtained with the Keck/HIRES and the AAT/UCLES spectrometers .
These measurements strongly confirm the inner planet with period of 2.985 d , with orbital parameters in very good agreement with those of the Geneva group .
However these Doppler measurements show no evidence of the outer planet , at thresholds of 1/4 ( 3 m s ^ { -1 } ~ { } ) of the reported velocity amplitude of 13.8 m s ^ { -1 } ~ { } .
Thus , the existence of the outer planet is in question .
Indeed , the current Doppler measurements reveal no evidence of any second planet with periods less than a year .