It was discovered by British astronomer David J. Asher at Siding Spring Observatory in New South Wales, Australia, on 3 February 1995.
[2] Achristou is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System.
[3] In May 2013, a rotational lightcurve of Achristou was obtained from photometric observations by American astronomer Robert Stephens at the Center for Solar System Studies (U81) in California.
Lightcurve analysis gave a rotation period of 8.84 hours with a low brightness variation of 0.09 magnitude (U=2+).
[6][a] Based on the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, Achristou measures 1.9 kilometers in diameter and its surface has an albedo of 0.33,[4][5] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.30 and calculates a diameter of 1.8 kilometers with an absolute magnitude of 15.7.