[11]: 23 Three rotational lightcurves of Drobyshevskij were obtained from photometric observations by astronomers at the Palomar Transient Factory in California.
Lightcurve analysis gave a rotation period between 3.87 and 3.882 hours with a brightness amplitude between 0.31 and 0.38 magnitude (U=2/2/2).
[8][9] The Collaborative Asteroid Lightcurve Link (CALL) adopts a period of 3.875 hours from observations made in the S-band as the best result.
[5][6][7] CALL assumes an albedo of 0.08 and calculates a diameter of 14.19 kilometers based on an absolute magnitude of 12.6.
He is known for his cosmogonical models and theories about the origin of the small Solar System bodies as well as for his research on stellar magnetic fields.