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. It is named for a character in Mozart's opera, Don Giovanni ).
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.
References (online, AcuA catalog p. 153)
External links Asteroid Lightcurve Database (LCDB), query form (info ) Dictionary of Minor Planet Names, Google books Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center