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 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.94 yr (31026 days) |
| Aphelion | 2.9312 AU (438.50 Gm) |
| Perihelion | 1.7676 AU (264.43 Gm) |
| 2.3494 AU (351.47 Gm) | |
| Eccentricity | 0.24765 |
| 3.60 yr (1315.3 d) | |
| 152.27° | |
| 0° 16m 25.32s / day | |
| Inclination | 21.558° |
| 337.28° | |
| 253.93° | |
| Earth MOID | 0.881322 AU (131.8439 Gm) |
| Jupiter MOID | 2.38469 AU (356.745 Gm) |
| Jupiter Tisserand parameter | 3.426 |
| Physical characteristics | |
| Dimensions |
9.20±0.24 km[4] 10.229±0.082 km[5] 10.54 km (caculated)[3] |
| 27.1 h (1.13 d)[1][6] | |
|
0.337±0.019[4] 0.2466±0.0459[5] 0.23 (assumed)[3] | |
| S [3] | |
| 12.2 | |
|
| |
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
- 1 2 3 "JPL Small-Body Database Browser: 1803 Zwicky (1967 CA)" (2015-10-14 last obs.). Jet Propulsion Laboratory. Retrieved 20 April 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1803) Zwicky. Springer Berlin Heidelberg. p. 144. ISBN 978-3-540-29925-7. Retrieved November 2015.
- 1 2 3 4 5 "LCDB Data for (1803) Zwicky". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
- 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
- 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015.
- 1 2 Behrend, Raoul. "Asteroids and comets rotation curves (1803) Zwicky". Geneva Observatory. Retrieved November 2015.
- ↑ "1803 Zwicky (1967 CA)". Minor Planet Center. Retrieved November 2015.
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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