103P/HARTLEY 2 WAS STUDIED EXTENSIVELY IN 2010 BY THE EPOXI DISCOVERY MISSION (A'HEARN ET AL. 2011) AND ITS ASSOCIATED GROUND-BASED CAMPAIGN (MEECH ET AL. 2011). THE FLYBY REVEALED ONE OF THE MOST DETAILED VIEWS OF VOLATILE OUTGASSING EVER OBSERVED IN A COMET. EPOXI FOUND ABUNDANT MICRON-SIZED ICY GRAINS AS WELL AS LARGER CHUNKS RELEASED FROM A SMALL BILOBATE NUCLEUS. ALL PREVIOUS IN DEPTH ANALYSES OF EPOXI DATA HAVE FOCUSED ON THE MAJOR VOLATILES: H2O RELEASED IN THE GAS-PHASE FROM THE NUCLEUS AND THE ICY GRAINS IN THE COMA AND CO2 A PLAUSIBLE DRIVER OF THE PRIMARY NUCLEUS ACTIVITY. THIS PROJECT FILLS TWO MAJOR GAPS IN COMPREHENDING THE EPOXI DATA. WE PROPOSE THE FIRST IN DEPTH STUDY OF INTEGRATED INTENSITY AND SPECTRAL CONTENT OF THE ORGANIC EMISSION FEATURE PROMINENT IN EPOXI HRI-IR SPECTROSCOPIC DATA BETWEEN ~3-4 MICRONS. WE ALSO PROPOSE FULL EXAMINATION OF SPATIAL AND TEMPORAL RELATIONSHIPS BETWEEN VOLATILES IN THE COMA OF THIS HYPERACTIVE COMET IN PARTICULAR CO2 AND ORGANIC GASES. ORGANICS WERE NOT ADDRESSED IN PREVIOUS STUDIES AND UNDERSTANDING THEIR COMPOSITION VARIABILITY AND RELATION TO OTHER VOLATILES IS VITAL IN DETERMINING HOW VOLATILES ARE ASSOCIATED IN THE NUCLEUS. OUR GOALS CAN ONLY BE REALIZED UTILIZING COMPLEMENTARY (AND CONTEMPORANEOUS) EPOXI AND HIGH SPECTRAL RESOLUTION GROUND-BASED INFRARED (IR) SPECTRA. THIS PROJECT ADDRESSES VOLATILE ABUNDANCES AND SPATIAL RELATIONSHIPS IN THE COMA OF 103P/HARTLEY 2 IN A SYSTEMATIC INTEGRATED STUDY AT BOTH LOCAL AND GLOBAL SPATIAL SCALES. - A WEALTH OF IR SPECTRAL DATA ACQUIRED CONTEMPORANEOUSLY BY THE EPOXI HRI-IR AND KECK II NIRSPEC INSTRUMENTS ARE PUBLICLY AVAILABLE FOR DIRECT COMPARISON AND SYNERGY. - HIGH SPATIAL RESOLUTION NEAR-NUCLEUS EPOXI DATA CAPTURING ACTIVITY AND VOLATILE RELEASE FROM THE NUCLEUS WILL BE USED TO INVESTIGATE THE DISTRIBUTION OF VOLATILE ORGANICS IN THE INNERMOST COMA THE TEMPORAL VARIABILITY OF THE ORGANIC FEATURE SOURCES OF ORGANIC VOLATILE RELEASE AND THEIR CORRELATION (OR LACK THEREOF) WITH H2O AND CO2. - PREVIOUSLY ANALYZED AND WELL-UNDERSTOOD HIGH SPECTRAL RESOLUTION GROUND-BASED DATA FROM KECK ARE NEEDED TO (1) VALIDATE AND EXTEND FLUORESCENCE MODELS IN ORDER TO ESTABLISH LIMITATIONS IN INTERPRETING LOWER SPECTRAL RESOLUTION EPOXI DATA WITHIN THE INNER COMA AND (2) DETERMINE SPATIAL DISTRIBUTIONS OF GAS ROTATIONAL TEMPERATURE AND COLUMN ABUNDANCE OF VOLATILES IN THE GLOBAL COMA OF HARTLEY 2. THIS PROJECT WILL EXTEND THE SCIENTIFIC RETURN OF AND BROADEN PARTICIPATION IN THE EPOXI MISSION AND PLACE HARTLEY 2 EPOXI RESULTS INTO THE CONTEXT OF THE CONTEMPORANEOUS LARGER FIELD OF VIEW AND MUCH HIGHER SPECTRAL RESOLUTION DATA OBTAINED FROM EARTH UTILIZING THE TWO DATA SETS AS ORIGINALLY DESIGNED. OUR UNIQUELY QUALIFIED TEAM LEVERAGES EXTENSIVE EXPERTISE FROM COMET MISSIONS THE EPOXI HRI-IR ANALYSES OF H2O AND CO2 AND STATE-OF-THE-ART GROUND-BASED SPECTROSCOPY AND MODELING OF COMETS (FEAGA ET AL. 2012 2017; FOUGERE ET AL. 2013; DELLO RUSSO ET AL. 2011; BONEV ET AL. 2013; AND REFERENCES THEREIN).