255 Oppavia

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255 Oppavia
Discovery
Discovered by Johann Palisa
Discovery date31 March 1886
Designations
(255) Oppavia
Pronunciation /ɒˈpviə/
Named after
Opava
A886 FB, 1904 EC
1924 TA, 1938 VC
1938 XC, 1945 GD
1951 SG
Main belt
Orbital characteristics [1]
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)
2.746 AU (410.8 Gm)
Eccentricity 0.077427
4.551 yr (1,662.1 d)
Average orbital speed
17.98 km/s
261.139°
0° 12m 59.735s / day
Inclination 9.47209°
13.6708°
156.011°
Physical characteristics
Dimensions57.40±1.5  km
19.499  h (0.8125  d)
0.0374±0.002
X [2]
10.39

    Oppavia (minor planet designation: 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]

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    References

    1. 1 2 "255 Oppavia". JPL Small-Body Database . NASA/Jet Propulsion Laboratory . Retrieved 12 May 2016.
    2. 1 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.
    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.