est ▁star ▁in ▁the ▁summer ▁sk ies . ▁ ▁Trans its ▁in ▁front ▁of ▁the ▁star ▁G SC ▁ 0 3 0 8 9 - 0 0 9 2 9 ▁were ▁detected ▁by ▁two ▁ 1 0 ▁cm ▁teles cop es ▁operating ▁out ▁of ▁Pal om ar ▁and ▁Low ell ▁Observ ator ies . ▁Trans its ▁of ▁Tr ES - 3 ▁were ▁also ▁independently ▁observed ▁by ▁the ▁Hung arian ▁Autom ated ▁T eles cope ▁Network . ▁Seven ▁high - prec ision ▁radial ▁velocity ▁measurements ▁were ▁made ▁using ▁the ▁H I RES ▁spect rom eter ▁at ▁W . ▁M . ▁Ke ck ▁Observ atory , ▁which ▁confirmed ▁the ▁presence ▁of ▁a ▁planet ary ▁mass ▁companion ▁with ▁a ▁minimum ▁mass ▁twice ▁that ▁of ▁the ▁planet ▁Jup iter . ▁ ▁Character istics ▁The ▁planet ' s ▁home ▁star ▁is ▁slightly ▁smaller ▁and ▁cool er ▁than ▁the ▁Sun . ▁The ▁orb ital ▁period ▁is ▁less ▁than ▁one ▁and ▁a ▁third ▁days , ▁one ▁of ▁the ▁short est ▁known . ▁ ▁See ▁also ▁ ▁Trans - At l antic ▁Ex op lan et ▁Survey ▁ ▁Hot ▁Jup iter ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Mass ive ▁Trans iting ▁Planet ▁With ▁ 3 1 - hour ▁Year ▁Found ▁Ar ound ▁Dist ant ▁Star ▁ ▁Notes ▁for ▁planet ▁Tr ES - 3 ▁ ▁Tr ES - 3 ▁light ▁curve ▁using ▁differential ▁phot ometry ▁ ▁Category : Ex op lan ets ▁Category : Her cules ▁( const ell ation ) ▁Category : Trans iting ▁ex op lan ets ▁Category : Hot