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255 Oppavia is a sizeable Main belt asteroid. It was discovered by Austrian astronomer Johann Palisa on 31 March 1886 in Vienna and was named after Opava, a town in the Czech Republic, then part of Austria-Hungary, where Palisa was born. It is orbiting the Sun at a distance of 2.75 AU with an orbital eccentricity (ovalness) of 0.077 and a period of 4.55 yr. The orbital plane is inclined by an angle of 9.47° to the plane of the ecliptic.

Photometric observations made during 2013 indicate a synodic rotation period of 19.499±0.001 h with an amplitude of 0.16±0.02 in magnitude. The unusual light curve shows three uneven minima and maxima per cycle. In 1995, 255 Oppavia was suggested as a peripheral member of the now defunct Ceres asteroid family, but was found to be an unrelated interloper on the basis of its non-matching spectral type. It classified as a dark X-type asteroid in the Tholen taxonomy.

References

1. ^ "255 Oppavia". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
2. ^ Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "SOS: the visible spectroscopic survey of 820 asteroids" (PDF). Icarus. 172 (1): 179–220. Bibcode:2004Icar..172..179L. doi:10.1016/j.icarus.2004.06.006. Retrieved 9 March 2022.
3. Schmadel, Lutz D. (2013). Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 56. ISBN 9783662066157.
4. Pilcher, Frederick (July 2013). "Rotation Period Determinations for 102 Miriam, 108 Hecuba, 221 Eos 225 Oppavia, and 745 Mauritia, and a Note on 871 Amneris". Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers. 40 (3): 158–160. Bibcode:2013MPBu...40..158P.
5. Morbidelli, A.; et al. (November 1995). "Asteroid Families Close to Mean Motion Resonances: Dynamical Effects and Physical Implications" (PDF). Icarus. 118 (1): 132–154. Bibcode:1995Icar..118..132M. doi:10.1006/icar.1995.1181. Retrieved 9 April 2022.

External links

• The Asteroid Orbital Elements Database
• Minor Planet Discovery Circumstances
• Asteroid Lightcurve Data File
• Orbital simulation of asteroid 255 Oppavia
• Asteroid 255 Oppavia in Planetky z našich luhů a hájů (in Czech)
• 255 Oppavia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 255 Oppavia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

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