[14] A rotational lightcurve of Acapulco was obtained from photometric observations made at the Palomar Transient Factory in September 2010.
[12] According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Acapulco measures between 14.66 and 23.02 kilometers in diameter, and its surface has an albedo in the range of 0.037 to 0.10.
[5][6][7][9][10][11] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 and calculates a smaller diameter of 12.35 kilometers with an absolute magnitude of 12.66.
[3] This minor planet was named for the Mexican city of Acapulco, known for its major seaport, which is considered to be among the most beautiful ones in the world.
Hasekura Tsunenaga (1571–1622) – retainer of Date Masamune, who founded the city of Sendai – stopped by at Acapulco on his diplomatic mission to Rome.