Constantia (minor planet designation: 315 Constantia) is a stony background asteroid from the inner region of the asteroid belt, approximately in diameter. It was discovered by Austrian astronomer Johann Palisa at the Vienna Observatory on 4 September 1891. The asteroid is a member of the Flora family. It is spinning with a rotation period of and shows a brightness variation of in magnitude. References External links 000315 Discoveries by Johann Palisa Named minor planets 18910904