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255 Oppavia
Discovery
Discovered by	Johann Palisa
Discovery date	31 March 1886
Designations
MPC designation	(255) Oppavia
Pronunciation	/ɒˈpeɪviə/
Named after	Opava
Alternative designations	A886 FB, 1904 EC; 1924 TA, 1938 VC; 1938 XC, 1945 GD; 1951 SG
Minor planet category	Main belt
Orbital characteristics
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	129.86 yr (47,431 d)
Aphelion	2.959 AU (442.6 Gm)
Perihelion	2.533 AU (379.0 Gm)
Semi-major axis	2.746 AU (410.8 Gm)
Eccentricity	0.077427
Orbital period (sidereal)	4.551 yr (1,662.1 d)
Average orbital speed	17.98 km/s
Mean anomaly	261.139°
Mean motion	0° 12m 59.735s / day
Inclination	9.47209°
Longitude of ascending node	13.6708°
Argument of perihelion	156.011°
Physical characteristics
Dimensions	57.40±1.5 km
Synodic rotation period	19.499 h (0.8125 d)
Geometric albedo	0.0374±0.002
Spectral type	X
Absolute magnitude (H)	10.39

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.^[3] 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.^[1]

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.^[4] In 1995, 255 Oppavia was suggested as a peripheral member of the now defunct Ceres asteroid family,^[5] 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.^[2]

References

^ ^a ^b "255 Oppavia". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
^ ^a ^b Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "S³OS²: 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.
^ Schmadel, Lutz D. (2013). Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 56. ISBN 9783662066157.
^ 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.
^ 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

This article about an asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it.

[jpldata-1] "255 Oppavia". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.

[Lazzaro_et_al_2004-2] Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "S³OS²: 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.

[Schmadel2013-3] Schmadel, Lutz D. (2013). Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 56. ISBN 9783662066157.

[Pilcher2013-4] 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.

[Morbidelli_et_al_1995-5] 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.

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