sentences:  Lightcurve analysis gave a rotation period of 12.189 hours with a brightness variation of 0.20 magnitude ().In January 2009, a refined period of 11.230 hours and an amplitude of 0.12 magnitude was measured by photometrist Brian Warner at his Palmer Divide Observatory in Colorado, United States ().According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's WISE telescope, "Christa" measures between 82.35 and 101.04 kilometers in diameter and its surface has a low albedo between 0.04 and 0.064.