2101 Adonis
2101 Adonis, provisional designation: 1936 CA, is an asteroid on an extremely eccentric orbit, classified as potentially hazardous asteroid and near-Earth object of the Apollo group. Adonis measures approximately 1 kilometer (0.6 miles) in diameter. Discovered by Eugène Delporte at Uccle in 1936, it became a lost asteroid until 1977. It may also be an extinct comet and a source of meteor showers. It was named after Adonis from Greek mythology.
| Discovery | |
|---|---|
| Discovered by | E. Delporte |
| Discovery site | Uccle Obs. |
| Discovery date | 12 February 1936 |
| Designations | |
MPC designation | (2101) Adonis |
| Pronunciation | /əˈdoʊnɪs/, or /əˈdɒnɪs/ (NAE) |
Named after | Adonis (Greek mythology) |
Alternative designations | 1936 CA |
Minor planet category | NEO · PHA · Apollo |
| Orbital characteristics | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 82.16 yr (30,009 d) |
| Aphelion | 3.3069 AU |
| Perihelion | 0.4415 AU |
Semi-major axis | 1.8742 AU |
| Eccentricity | 0.7644 |
Orbital period (sidereal) | 2.57 yr (937 d) |
Mean anomaly | 182.53° |
Mean motion | 0° 23m 2.76s / day |
| Inclination | 1.3237° |
Longitude of ascending node | 349.57° |
| 43.551° | |
| Earth MOID | 0.0116 AU (4.52 LD) |
| Physical characteristics | |
Mean diameter | |
| 18.8 | |
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