785 Zwetana is a minor planet orbiting the Sun that was discovered by Adam Massinger, an assistant at the Heidelberg Observatory, on March 30, 1914. Radar observations indicate that it is metallic.
In 1990, the asteroid was observed from the European Southern Observatory, allowing a composite light curve to be produced that showed a rotation period of 8.919 ± 0.004 hours and a brightness variation of 0.13 ± 0.01 in magnitude.
- ^ Yeomans, Donald K., 785 Zwetana, JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25.
- ^ a b Dotto, E. et al. (June 1992), M-type asteroids - Rotational properties of 16 objects, Astronomy and Astrophysics Supplement Series 95 (2): 195–211, Bibcode:1992A&AS...95..195D.