24591 2139T-3 is a main belt asteroid with an estimated diameter of 10 km. It was discovered on October 16 1977, by C. J. van Houten, I. van Houten-Groeneveld, and T. Gehrels at Palomar. The semi-major axis is 2.56 AU, the eccentricity is 0.057 and the inclination is 3.59 degrees.
This asteroid was observed on one night, October 21, 2007, when it was in the field of another asteroid I was studying. With only one night of data, no reliabel period could be determined.