September 15, 2010
2010 RA91 was discovered by Arizona amateur Joe Hobart. Joe used a 0.36-m or 14″ Schmidt-Cassegrain located at his observatory, named Kachina Observatory, in Flagstaff.
I forgot to mention that one of the NEAs presented in ‘Recent Discoveries – Sept 12, 2001‘, 2010 RN80 was also found by an amateur astronomer. Leonid Elenin is an amateur astronomer from Lubertsy City, Russia who routinely observes asteroids, comets and variable stars with a remotely operated telescope in New Mexico. The 0.45-m or 18″ astrograph he used is part of Tzec Maun Observatory.
The weather is once again clear in the American Southwest so the discoveries should continue for a few more days. Then the brightening Moon will shut the surveys down for a few nights.
Asteroid Type MOID a e i H Mag Discoverer MPEC 2010 RM122 Amor 0.043 1.30 0.22 7.2 25.6 21 Mount Lemmon 2010-R114 2010 RA91 Apollo 0.003 2.16 0.35 5.6 23.4 19 J. Hobart 2010-R110 Comet Type MOID q a e i Mag Discoverer MPEC None Type Aten - Earth crossing with semi-major axis (avg distance from Sun) < 1 AU Apollo - Earth crossing with semi-major axis (avg distance from Sun) > 1 AU Amor - non-Earth crossing with perihelion distance < 1.3 AU JFC - Jupiter family comet HFC - Halley family comet LPC - Long-period comet MBC - Main belt comet MOID - Minimum Orbit Intercept Distance, minimum distance between asteroid and Earth's orbit a - semi-major axis, average distance from Sun in AU (1 AU = 93 million miles) e - eccentricity i - inclination H - absolute magnitude Mag - magnitude at discovery Discoverer - survey or person who discovered the object MPEC - Minor Planet Electronic Circular, the discovery announcement