899 Jokaste is a main belt asteroid with an estimated diameter of 35 km. It was discovered on August 3, 1918 by Max Wolf at Heidelberg. The semi-major axis is 2.911 AU, the eccentricity is 0.199 and the inclination is 12.43 degrees.
Observations were made on seven nights during the period from October 12, 2003 to January 11, 2004. The derived period was 4.636 hours hours and the amplitude 0.4 magnitude.