Discovery images taken with the 1.3-meter Warsaw Telescope at Las Campañas, ChilePrecovery images of Dziewanna taken in 2003[12]
Dziewanna orbits the Sun at a distance of 32.6 to 108.3 AU once every 591 years and 4 months (215,992 days). Its orbit has an eccentricity of 0.54 and an inclination of 29° with respect to the ecliptic.[3]
It is currently 39.1 AU from the Sun and will reach perihelion in 2038.[3][10] A ten-million-year integration of the orbit shows that this object is in a 2:7 resonance with Neptune.[4]
In 2010, the thermal radiation of Dziewanna was observed by the Herschel Space Telescope, which allowed astronomers to estimate its diameter at about 470 km (290 mi).[6]Astellar occultation by Dziewanna was observed on 17 May 2019, yielding a single-chord diameter of 504 km (313 mi).[7]
A rotational lightcurve was obtained from photometric observations at the discovering observatory, with the 2.5-meter Irénée du Pont Telescope, and published in May 2013. The lightcurve shows that the rotation periodis7.07±0.05 hours; the variation in brightness is of magnitude 0.12 (U=2).[9]
Observations by American astronomer Michael Brown at the Keck telescope in March 2012 failed to find a satellite. There is therefore currently no means to determine Dziewanna's mass.[6]
^JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
^ abcdefgPál, A.; Kiss, C.; Müller, T. G.; Santos-Sanz, P.; Vilenius, E.; Szalai, N.; et al. (May 2012). ""TNOs are Cool": A survey of the trans-Neptunian region. VII. Size and surface characteristics of (90377) Sedna and 2010 EK139". Astronomy and Astrophysics. 541: 4. arXiv:1204.0899. Bibcode:2012A&A...541L...6P. doi:10.1051/0004-6361/201218874. S2CID119117186.
^ ab"TNO Results". ERC Lucky Star Project. Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA). Retrieved 13 July 2020.
