531 Zerlina

Zerlina (minor planet designation: 531 Zerlina), provisional designation 1904 NW, carbonaceous Palladian asteroid from the central region of the asteroid belt, approximately 18 kilometers in diameter. It was discovered by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory on 12 April 1904.

Orbit and characteristics
Observations using the IRAS satellite have shown it to have an absolute magnitude of 11.8, a diameter of 15.19 kilometers, a rotational period of 16.706 hours, and an albedo of 0.1460.

Naming
It is named for a character in Mozart's opera, Don Giovanni H 57).