2010 RF12

Asteroid 2010 RF12 (Fig.1) was observed at Siding Spring (Faulkes Telescope South) in September 07.61 UT 2010, taking six images, split into two consecutive sequences, with the Sloan filters g, r and i. We convert the obtained Sloan colors of the asteroid to the Johnson-Cousins photometric system using the transformation equations of Chonis and Gaskell (2008). The mean colors of the asteroid correspond to an SR type. Using our estimated V magnitude and the mean MPC magnitudes, we determined H=28.46±0.05 and G=0.31±0.06 (Fig.2). The G value (see Warner, Harris and Pravec, 2009) suggests a more accurate classification of this object as S-type. The H-magnitude in combination with the albedo typical for the S-complex implies D=6±1m.

These results were published in Betzler et al. (2012).

Fig.1 - 2010 RF12 (arrow) and  comparation stars

Fig.2 - Diagram of the reduced magnitude of 2010 RF12 as a function of phase angle.
The solid black line corresponds to a curve with H= 28.46±0.05 and G=0.31±0.06.