[1] In the SDSS-based taxonomy, Boucolion is a D-type asteroid,[10][12] the most common type among the larger Jupiter trojans.
[9][11] In September 2012, a rotational lightcurve of Boucolion was first obtained from photometric observations by astronomers at the Palomar Transient Factory (PTF) in California.
Lightcurve analysis gave a rotation period of 16.150 and 16.177 hours with a brightness amplitude of 0.23 and 0.25 magnitude in the R- and S-band, respectively (U=2/2).
[11][13] A more refined, alternative period solution of 32.44±0.05 hours with an amplitude of 0.21 magnitude was measured by Robert Stephens at the Center for Solar System Studies in January 2015 (U=2).
[6][7] CALL assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 53.16 kilometers based on an absolute magnitude of 10.1.