3247 Di Martino
3247 Di Martino (prov. designation: ) is a dark Nysa family asteroid from the inner regions of the asteroid belt. It was discovered on 30 December 1981, by American astronomer Edward Bowell at Lowell's Anderson Mesa Station near Flagstaff, Arizona, in the United States. The asteroid has a rotation period of 5.4 hours and measures approximately in diameter. It was named for Italian astronomer Mario di Martino. Orbit and classification Di Martino is member of the Nysa–Polana complex (), one of the largest asteroid families. Its low albedo (see below) it likely belongs to the Polana family within the larger Nysa–Polana complex. The asteroid orbits the Sun in the inner main-belt at a distance of 2.1–2.7 AU once every 3 years and 8 months (1,339 days; semi-major axis of 2.38 AU). Its orbit has an eccentricity of 0.13 and an inclination of 4° with respect to the ecliptic. The body's observation arc begins with its first observation as at Heidelberg Observatory in January 1909, almost 73 years prior to its official discovery observation at Anderson Mesa. Naming This minor planet was named after Mario di Martino (born 1947), Italian astronomer and photometrist of lightcurves at the Turin Observatory. The official