CATACLYSMIC VARIABLES (CVS) ARE THE MOST ABUNDANT CLASS OF X-RAY BINARY SYSTEM. WE HAVE RECENTLY DISCOVERED A NEW CV (INTERMEDIATE POLAR) THAT IS CONSISTENT WITH THE POSITION OF THE PLANETARY NEBULA HATRS. THE DISCOVERY OF A COMPACT BINARY SYSTEM IN A PLANETARY NEBULA COMES WITH THE PROMISE OF INSIGHT INTO COMMON ENVELOPE PHYSICS AND SN IA PROGENITORS IF THE BINARY MASS IS GREATER THAN CHANDRASEKHAR. HEREIN WE PROPOSE TO TAKE ADVANTAGE OF THE SUPERIOR HARD X-RAY SENSITIVITY OF NUSTAR TO MEASURE THE TEMPERATURE OF THE ACCRETION SHOCK AND CONSTRAIN THE MASS OF THE WHITE DWARF IN THIS INTRIGUING BINARY SYSTEM.