1803 Zwicky
| Discovery | |
|---|---|
| Discovered by | P. Wild |
| Discovery site | Zimmerwald Obs. |
| Discovery date | 6 February 1967 |
| Designations | |
| MPC designation | (1803) Zwicky |
|
Named after
|
Fritz Zwicky |
| 1967 CA · 1931 DL | |
| main-belt · Phocaea | |
| Orbital characteristics | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 85.73 yr (31,313 days) |
| Aphelion | 2.9313 AU |
| Perihelion | 1.7666 AU |
| 2.3489 AU | |
| Eccentricity | 0.2479 |
| 3.60 yr (1,315 days) | |
| 261.77° | |
| 0° 16m 25.68s / day | |
| Inclination | 21.558° |
| 337.27° | |
| 253.95° | |
| Physical characteristics | |
| Dimensions |
9.20±0.24 km 9.934±0.080 km 10.06 km (calculated) 10.229±0.082 km |
| 27.1±0.1 h | |
| 0.23 (assumed) 0.2466±0.0459 0.259±0.038 0.337±0.019 |
|
| S | |
| 12.00 · 12.1 · 12.2 | |
1803 Zwicky, provisional designation 1967 CA, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter. It was discovered on 6 February 1967, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland.
The S-type asteroid is a member of the Phocaea family, a smaller population of asteroids with similar orbital characteristics and named after their largest member, 25 Phocaea. Zwicky orbits the Sun at a distance of 1.8–2.9 AU once every 3 years and 7 months (1,315 days). Its orbit has an eccentricity of 0.25 and an inclination of 22° with respect to the ecliptic. It was first identified as 1931 DL at Lowell Observatory in 1931, extending the body's observation arc by 36 years prior to its official discovery observation.
In March 2003, a fragmentary light-curve of Zwicky was obtained from photometric observations by French amateur astronomer Laurent Bernasconi. It gave a rotation period of 27.1 hours with a brightness amplitude of 0.08 magnitude (U=1). As of 2017, no other rotational light-curves have been obtained.
According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Zwicky measures between 9.2 and 10.2 kilometers in diameter, and its surface has an albedo between 0.25 and 0.34. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for Phocaea asteroids of 0.23, and calculates a diameter of 10.54 kilometers based on an absolute magnitude of 12.2.
...
Wikipedia