NEAR-EARTH OBJECTS (NEOS) ARE ESSENTIAL TO UNDERSTANDING THE ORIGIN OF THE SOLAR SYSTEM THROUGH THEIR COMPOSITIONAL LINKS TO METEORITES. AS TRACERS OF OTHER PARTS OF THE SOLAR SYSTEM THEY PROVIDE INSIGHT TO MORE DISTANT POPULATIONS. THEIR RELATIVELY SMALL SIZES AND COMPLEX DYNAMICAL HISTORIES MAKE THEM EXCELLENT LABORATORIES FOR STUDYING ONGOING SOLAR SYSTEM PROCESSES SUCH AS SPACE WEATHERING PLANETARY ENCOUNTERS AND NON-GRAVITATIONAL DYNAMICS. KNOWLEDGE OF THEIR PHYSICAL PROPERTIES IS ESSENTIAL TO IMPACT HAZARD ASSESSMENT. FINALLY THE PROXIMITY OF NEOS TO EARTH MAKE THEM FAVORABLE TARGETS FOR ROBOTIC AND HUMAN EXPLORATION.HOWEVER IN SPITE OF THEIR SCIENTIFIC IMPORTANCE ONLY THE LARGEST NEOS HAVE BEEN WELL STUDIED AND A REPRESENTATIVE SAMPLE OF PHYSICAL CHARACTERISTICS FOR SUB-KM NEOS DOES NOT EXIST.WE PROPOSE HERE FOR SUPPORT OF THE MISSION ACCESSIBLE NEAR-EARTH OBJECT SURVEY (MANOS). MANOS IS A FULLY ALLOCATED MULTI-YEAR SURVEY OF SUB-KM NEOS THAT IS READY TO PROVIDE A LARGE UNIFORM CATALOG OF PHYSICAL PROPERTIES (LIGHT CURVES + COLORS + SPECTRA + ASTROMETRY) REPRESENTING A 100-FOLD INCREASE OVER PRESENT KNOWLEDGE OF NEOS IN THIS SIZE RANGE. FROM THIS COMPREHENSIVE CATALOG WE WILL DERIVE GLOBAL PROPERTIES OF THE NEO POPULATION AS WELL AS IDENTIFY INDIVIDUAL TARGETS THAT ARE OF POTENTIAL INTEREST FOR EXPLORATION.WE WILL ACCOMPLISH THESE GOALS FOR APPROXIMATELY 500 MISSION-ACCESSIBLE NEOS ACROSS THE VISIBLE AND NEAR-INFRARED RANGES USING TELESCOPE ASSETS IN BOTH THE NORTHERN AND SOUTHERN HEMISPHERES. MANOS HAS ALREADY BEEN AWARDED OR IS GUARANTEED TIME ON 10 DIFFERENT TELESCOPES RANGING IN APERTURE FROM 1 TO 8 METERS AND WILL GRADUALLY BEGIN IN LATE 2013 WITH FULL OPERATIONS ESTABLISHED BY MID-2014. WE WILL USE PROVEN ANALYSIS TOOLS TO MODEL AND CHARACTERIZE EACH OF THE OBJECTS OBSERVED BY MANOS. WE WILL CONDUCT THIS SURVEY WITH COMPLETE TRANSPARENCY SHARING OUR TARGET LISTS AND DATA PRODUCTS ON PUBLICLY-ACCESSIBLE WEBSITES.A REPRESENTATIVE SAMPLE OF MORE THAN 500 LARGE KM-SCALE NEOS HAS ALREADY BEEN OBTAINED. THE FRONTIER OF NEO RESEARCH INVOLVES PUSHING OBSERVATIONAL LIMITS TO BUILD AN EQUIVALENT REPRESENTATIVE DATABASE OF THE SMALLEST NEOS. MANOS REPRESENTS THIS NEXTGENERATION OF NEO SURVEYS MADE POSSIBLE BY ESTABLISHING A REGULAR CADENCE OF OBSERVATIONS TO ACCESS SMALL NEWLY DISCOVERED NEOS WITHIN DAYS OR WEEKS OF FIRST DETECTION BEFORE THEY FADE BEYOND OBSERVATIONAL LIMITS.MANOS WILL ADDRESS THE FOLLOWING KEY TOPICS RELEVANT TO PLANETARY SCIENCE AND EXPLORATION:- COMPOSITIONAL DISCREPANCIES BETWEEN KM-SCALE NEOS AND METEORITES- SPACE WEATHERING PROCESSES BY TARGETING SMALL OBJECTS THAT ARE DYNAMICALLY YOUNG AND THAT UNDERGO FREQUENT SURFACE-RESETTING PLANETARY ENCOUNTERS- THE INFLUENCE OF PLANETARY ENCOUNTERS ON NEO ROTATIONAL PROPERTIES- THE NEO BINARY RATE AND TIDAL FORMATION OF BINARY SYSTEMS- RADIATIVE TRANSFER OF REGOLITH-COVERED SURFACES BY ACCESSING OBJECTS ACROSS A RANGE OF VIEWING ASPECTS- DETERMINING PHYSICAL CRITERIA FOR PLANNING OF ROBOTIC AND HUMAN EXPLORATION MISSIONS
$711,785FY2014National Aeronautics and Space AdministrationNASA
Lowell Observatory, Flagstaff AZ