1509 Esclangona

1509 Esclangona is a small asteroid discovered on December 21, 1938 by André Patry from Nice, France. Its provisional designation was 1938 YG. It measures 12 km in diameter. It is named after Ernest Esclangon, a French astronomer.

Esclangona has a small moon, provisionally named S/2003 (1509) 1 , which measures 4 km in diameter, and orbits 140 km from its parent. This wide separation relative to the pair's size is rather unusual and it is believed that both Esclangona and its moon are ejecta from an asteroidal collision in the past that left the scene as a co-orbiting pair; a similar pairing is 3749 Balam and its moon [1].