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. Radar observations indicate that it is metallic.

785 Zwetana
Discovery
Discovered byAdam Massinger
Discovery siteHeidelberg
Discovery date30 March 1914
Designations
(785) Zwetana
1914 UN
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc95.43 yr (34854 d)
Aphelion3.1099 AU (465.23 Gm)
Perihelion2.0273 AU (303.28 Gm)
2.5686 AU (384.26 Gm)
Eccentricity0.21073
4.12 yr (1503.6 d)
268.20°
0° 14m 21.912s / day
Inclination12.769°
71.882°
131.607°
Physical characteristics
Mean radius
24.27±0.9 km
8.919 h[2]
8.8882 h (0.37034 d)[1]
0.1245±0.010
9.45

    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.[2]

    References

    1. Yeomans, Donald K., "785 Zwetana", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 5 May 2016.
    2. Dotto, E.; et al. (June 1992), "M-type asteroids - Rotational properties of 16 objects", Astronomy and Astrophysics Supplement Series, 95 (2), pp. 195–211, Bibcode:1992A&AS...95..195D.


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