Gerald Kron
Gerald Kron ( April 6 , 1913 – April 9 , 2012 ) was an American astronomer who was one of the pioneers of high-precision photometry with photoelectric instrumentation . 
<triplet> Gerald Kron <subj> April 6, 1913 <obj> date of birth <subj> April 9, 2012 <obj> date of death