1803 Zwicky

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 Â· 1931 DL
main-belt Â· 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. 1 2 3 "JPL Small-Body Database Browser: 1803 Zwicky (1967 CA)" (2015-10-14 last obs.). Jet Propulsion Laboratory. Retrieved 20 April 2016.
    2. 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.
    3. 1 2 3 4 5 "LCDB Data for (1803) Zwicky". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 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.
    5. 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.
    6. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves (1803) Zwicky". Geneva Observatory. Retrieved November 2015.
    7. ↑ "1803 Zwicky (1967 CA)". Minor Planet Center. Retrieved November 2015.

    External links


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