255 Oppavia
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 31 March 1886 |
| Designations | |
|
Named after
|
Opava |
| A904 EC, A924 TA, 1938 VC, 1938 XC, 1945 GD, 1951 SG |
|
| Main belt | |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 129.86 yr (47431 d) |
| Aphelion | 2.95866 AU (442.609 Gm) |
| Perihelion | 2.53342 AU (378.994 Gm) |
| 2.74604 AU (410.802 Gm) | |
| Eccentricity | 0.077427 |
| 4.55 yr (1662.1 d) | |
|
Average orbital speed
|
17.98 km/s |
| 261.139° | |
| 0° 12m 59.735s / day | |
| Inclination | 9.47209° |
| 13.6708° | |
| 156.011° | |
| Earth MOID | 1.5404 AU (230.44 Gm) |
| Jupiter MOID | 2.00916 AU (300.566 Gm) |
| Jupiter Tisserand parameter | 3.324 |
| Physical characteristics | |
| Dimensions | 57.40±1.5 km |
| Mass | unknown |
|
Mean density
|
unknown |
|
Equatorial surface gravity
|
unknown |
|
Equatorial escape velocity
|
unknown |
| 19.499 h (0.8125 d) | |
| 0.0374±0.002 | |
| Temperature | unknown |
| P | |
| 10.39 | |
255 Oppavia is a sizeable Main belt asteroid. It classified as a dark P-type asteroid.
It was discovered by Johann Palisa on March 31, 1886 in Vienna and was named after Opava, town in the Czech Republic (then part of Austria-Hungary), where Palisa was born.
Oppavia was long thought to be a 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.
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Wikipedia