We report the detection of four new extra-solar planets from the Anglo-Australian Planet Search orbiting the somewhat metal-enriched stars HD 73526 , HD 76700 , HD 30177 and HD 2039 .
The planetary companion of HD 76700 has a circular orbit with a period of 3.98 d. With M \sin i =0.197 \pm 0.017M _ { \mathrm { JUP } } , or 0.69 times the mass of Saturn , is one of the lowest minimum mass extra-solar planets yet detected .
The remaining planets all have elliptical orbits with periods ranging from 190.5 d to 4.4 yr. All four planets have been found orbiting stars from a sub-sample of twenty metal-enriched and faint ( V < 9 ) stars , which was added to the Anglo-Australian Planet Search ’ s magnitude-limited V < 7.5 main sample in October 1998 .
These stars were selected to be metal-enriched on the basis of their Strömgren photometry , and their enrichment has been subsequently confirmed by detailed spectroscopic analysis .