209 Dido

209 Dido is a main-belt asteroid with a diameter of. It was discovered by Christian [Heinrich Friedrich Peters|C. H. F. Peters] on October 22, 1879, in Clinton, [Oneida County, New York|Clinton, New York] and was named after the mythical Carthaginian queen Dido. This asteroid is orbiting the Sun at a distance of with an eccentricity of 0.058 and a period of. The orbital plane is tilted at an angle of 7.2° to the plane of the ecliptic.
209 Dido is classified as a C-type asteroid and is probably composed of carbonaceous materials. Like many asteroids of its type, it has an extremely low albedo. Photometric observations at the Palmer Divide Observatory during 2005 showed a rotation period of hours with a brightness variation of in magnitude. The pole orientation in ecliptic coordinates, as determined from multiple light curve studies, is =.
209 Dido has been observed to occult 4 stars between 2005 and 2023.