Back 90 Antiope Afrikaans 90 أنتيوب Arabic 90 أنتيوب (كويكب) ARZ 90 Antiope AST 90 Antiope Azerbaijani (90) Антыёпа Byelorussian (90) Antíope Catalan (90) Антиопа CE Antiope (planetka) Czech (90) Antiope German
| Discovery [1] | |
|---|---|
| Discovered by | Robert Luther |
| Discovery date | October 1, 1866 |
| Designations | |
| (90) Antiope | |
| Pronunciation | /ænˈtaɪəpiː/[1] |
| 1952 BK2[2] | |
| Main belt[2] (Themis family) | |
| Adjectives | Antiopean |
| Orbital characteristics[2] | |
| Epoch July 23, 2010 (JD 2455400.5) | |
| Aphelion | 545.94 Gm 3.6494 AU |
| Perihelion | 398.02 Gm 2.6606 AU |
| 471.19 Gm 3.1550 AU | |
| Eccentricity | 0.15670 |
| 2046.9 d (5.60 yr) | |
Average orbital speed | 16.66 km/s |
| 304.12° | |
| Inclination | 2.2195° |
| 70.21° | |
| 242.96° | |
| Physical characteristics | |
| Dimensions | 93.0×87.0×83.6 km[3] 87.8 ± 1.0 km[3] |
| Mass | 8.3×1017 kg (whole system)[4] ~ 4.1−4.2 ×1017 kg (components) |
Mean density | 1.25 ± 0.05 g/cm3 (each)[5] |
| 0.687 d (16.50 h)[6] (synchronous) | |
| 0.060[7] | |
| C[8] | |
| 8.27 (together)[2] 9.02 (each component) | |
 | |
| Discovery[9] | |
|---|---|
| Discovered by | W. J. Merline, L. M. Close, J. C. Shelton, C. Dumas, F. Menard, C. R. Chapman, and D. C. Slater |
| Discovery date | August 10, 2000[10] |
| Designations | |
| Main belt (Themis family) | |
| Orbital characteristics[4] | |
| 171 ± 1 km | |
| Eccentricity | <0.006 |
| 0.687713 ± 0.00004 d (16.5051 ± 0.0001 h) | |
Average orbital speed | 18.0 m/s |
| Satellite of | Binary with 90 Antiope |
| Physical characteristics | |
| Dimensions | 89.4×82.8×79.6 km[3] |
| 83.8 ± 1.0 km[3] | |
| Mass | ~ 8.1−8.5 ×1017 kg[5] |
Equatorial escape velocity | variable; ~ 35−40 m/s |
| 0.687 d (16.50 h)[6] (synchronous) | |
| 9.02 | |
Antiope (minor planet designation: 90 Antiope) is a double asteroid in the outer asteroid belt. It was discovered on October 1, 1866, by Robert Luther. In 2000, it was found to consist of two almost-equally-sized bodies orbiting each other. At average diameters of about 88 km and 84 km, both components are among the 500 largest asteroids. Antiope is a member of the Themis family of asteroids that share similar orbital elements.[11]
- ^ Noah Webster (1884) A Practical Dictionary of the English Language
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