Recent Discoveries – Sept 14-15, 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

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