WHY TRACK NEAR EARTH OBJECTS? Safety of Planet Future exploitation of resources ◦ Mining of asteroids ◦ Water from comets for fuel
NASA Sponsored Program Minor Planetary Center Harvard Astrophysical Institute Funding Recently Increased Near Earth Asteroids Perihelion distance is less than 1.3 AU Near Earth Comets Perihelion distance is less than 1.3 AU Period is less than 200 years (short period)
CHANCE OF IMPACT IS VERY SMALL BUT REAL ◦ 784 NEOs over ½ mile wide currently tracked ◦ Only one poses risk of impact with 1 out of 2940 chance if hitting Earth in 40 years ◦ CHANCE OF IMPACT BY NEO ½ mile wide or larger: one every 500,000 years 1500 feet wide: one every 100,000 years 150 feet wide: one every 700 years 90 feet wide: one every 140 years
NEO Work At Hobbs Observatory ◦ Comets tracked for five year ◦ Measurer is Bob Elliott ◦ Observer is Bert Moritz ◦ Observations made with 24” telescope and Apogee U55 camera ◦ Data reduction done in Michigan ◦ Results sent to Smithsonian Astrophysical Institute at Harvard University
473 Remanzacco. Observers L. Donato, M. Gonano, V. Gonano, E. Guido, M. Travagini, G. Sostero. 0.45-m f/4.4 Newtonian reflector + CCD.750 Hobbs Observatory, Fall Creek. Observer N. Moritz. Measurer R. Elliott. 0.60-m f/5 reflector + CCD.808 El Leoncito. Observers M. L. Varela M., J. Vicentela. Measurer M. L. Varela M. 0.5-m f/7.5 double astrograph + CCD.834 Buenos Aires-AAAA. Observers R. Mackintosh, M. Konishi, R. Mykytyuk. Measurer R. Mackintosh. 0.25-m f/6.3 Schmidt-Cassegrain + CCD.900 Moriyama. Observer Y. Ikari. 0.26-m f/7.0 reflector + CCD.945 Observatorio Monte Deva. Observer J. R. Vidal. 0.36-m f/4.48 Schmidt-Cassegrain + CCD.
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