1803 Zwicky
| Discovery [1] | |
|---|---|
| Discovered by | P. Wild |
| Discovery site | Zimmerwald Obs. |
| Discovery date | 6 February 1967 |
| Designations | |
| MPC designation | 1803 Zwicky |
|
Named after
|
Fritz Zwicky[2] |
| 1967 CA · 1931 DL | |
| main-belt · Phocaea [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.65 yr (30,920 days) |
| Aphelion | 2.9312 AU |
| Perihelion | 1.7680 AU |
| 2.3496 AU | |
| Eccentricity | 0.2475 |
| 3.60 yr (1,316 days) | |
| 97.534° | |
| Inclination | 21.557° |
| 337.28° | |
| 253.94° | |
| Physical characteristics | |
| Dimensions | 9.20±0.24 km[4] 10.229±0.082 km[5] 10.54 km (caculated)[3] |
| 27.1 h[6] | |
| 0.337±0.019[4] 0.2466±0.0459[5] 0.23 (assumed)[3] |
|
| S [3] | |
| 12.2 | |
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1803 Zwicky, provisional designation 1967 CA, is a stony asteroid from the inner regions of the asteroid belt, about 10 kilometers in diameter. It was discovered by astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland on 6 February 1967.[7]
It belongs to the Phocaea family of asteroids and orbits the Sun at a distance of 1.8–2.9 AU once every 3 years and 7 months (1,316 days). The S-type asteroid has a rotation period of 27.1 hours.[6] Its geometric albedo amounts to 0.337±0.019 and 0.2466±0.0459, as measured by the Akari and NEOWISE survey, respectively.[4][5] The LCDB project assumes an albedo of 0.23.[3]
The asteroid was named after Swiss astronomer Fritz Zwicky (1898–1974), who was a professor at Caltech and a pioneer in many fields, most notably in the study of galaxy clusters and supernovas, in high-energy astrophysics, and in developing jet propulsion for spacecraft and airplanes.[2] He was the first to infer the existence of unseen matter and coined the term Dark matter. The lunar crater Zwicky is also named in his honour.
References
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<references />, or <references group="..." />External links
- Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Geneve, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1803 Zwicky at the JPL Small-Body Database
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