1660 Wood
1660 Wood, provisional designation , is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 12 kilometers in diameter. It was named after British–South African astronomer Harry Edwin Wood. Discovery. "Wood" was discovered on 7 April 1953, by South African astronomer Jacobus Bruwer at Johannesburg Observatory in South Africa. It was the second numbered discovery made by Bruwer. He also discovered the minor planets 1658 Innes, 1794 Finsen, and 3284 Niebuhr. The asteroid 1811 Bruwer was named in his honour by the Dutch, Dutch-American astronomer trio of the Palomar–Leiden survey. Orbit and  classification. "Wood" is a S-type asteroid and member of the Phocaea family (). It orbits the Sun in the inner main-belt at a distance of 1.7–3.1 AU once every 3 years and 9 months (1,354 days). Its orbit has an eccentricity of 0.30 and an inclination of 21° with respect to the ecliptic. It was first identified as at Lowell Observatory in 1931, extending the body's observation arc by 22 years prior to its official discovery observation. Physical characteristics. Rotation period. From January to March 2012, four rotational lightcurves of "Wood" were obtained from photometric observations taken  by astronomers Julian Oey, Kevin Hills, and Xianming Han. Lightcurve analysis gave a concurring rotation period of 6.809 hours with a brightness variation between of 0.14 and 0.26 magnitude (). Diameter and albedo. According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, "Wood" measures 11.34 kilometers in diameter, and its surface has an albedo of 0.239. The "Collaborative Asteroid Lightcurve Link" assumes an albedo of 0.23 and calculates a diameter of 12.67 kilometers with an absolute magnitude of 11.7. Naming. This minor planet was named for British–South African astronomer Harry  Edwin Wood (1881–1946), who was the second director of the Union Observatory at which the asteroid was discovered, and who had discovered 12 asteroids himself between 1911 and 1928. He had the prime responsibility for the famous "Franklin-Adams Star Camera" (Franklin-Adams photographic refractor) since its acquisition in 1909 "(also see 1925 Franklin-Adams)". The official was published by the Minor Planet Center on 1 July 1972 ().