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 9 March 1882, in Vienna.
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.
The curve has two asymmetrical maxima and minima per 20.283-hour cycle.
[4] A flyby of Rosa by the JUICE spacecraft, which is planned to pass through the asteroid belt twice, was proposed to occur on 15 October 2029.