276 Adelheid
276 Adelheid is a dark Alauda asteroid from the outer region of the asteroid belt, approximately 121 kilometers in diameter. It was discovered by Austrian astronomer Johann Palisa at Vienna Observatory on 17 April 1888. The meaning of the asteroids's name is unknown.
Classification
Adelheid is a member of the Alauda family, a large family of typically bright carbonaceous asteroids and named after its parent body, 702 Alauda.Physical characteristics
Photometric observations in 1992 gave a lightcurve with a period of 6.328 ± 0.012 hours and a brightness variation of 0.10 ± 0.02 in magnitude. The curve is regular with two maxima and minima.In the Tholen classification, its spectrum has been characterized as that of an X-type asteroid, while polarimetric observations refined its classification to a primitive P-type.