Tags: Planet.
223 Rosa is a large Themistian asteroid. It is classified as a combination of C-type and P-type asteroids so it is probably composed of carbonaceous material rich in water ice. It was discovered by Johann Palisa on March 9 1882 in Vienna. The origin of the name is not known.Photometric observations made in 2011–2012 at the Organ Mesa Observatory in Las Cruces New Mexico produced a light curve with a period of 20.283 ± 0.002 hours and a brightness variation of 0.13 ± 0.02 in magnitude.