785 Zwetana
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. It was named for the daughter of Kiril Popoff, a Bulgarian astronomer. This asteroid is orbiting  from the Sun with an eccentricity (ovalness) of 0.21 and a period of . The orbital plane is inclined by an angle of 12.8° to the plane of the ecliptic. This asteroid spans a girth of  and it has a Tholen taxonomic class of M. Radar observations indicate that it is almost certainly metallic. The near infrared spectra suggests the presence of spinel on the surface, which is indicative of calcium–aluminium-rich inclusions. The best meteorite analog to the near infrared spectrum of this object is the enstatite chondrite, Abee. 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  and a brightness variation of  in magnitude. 2013 observations from the Palmer Divide Observatory found a rotation period of 8.885 hours with a magnitude amplitude of 0.18. This is consistent with other published results. References

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Discoveries by Adam Massinger
Named minor planets
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