 The body's observation arc begins at Heidelberg, six days after its official discovery observation.In the SMASS classification, "Gefion" is a Sl-subtype that transitions from the common stony S-type asteroids to the rather rare L-types.In 2010 and 2011, two rotational lightcurves of "Gefion" were obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California .