334 Chicago

334 Chicago
	Modelled shape of Chicago from its lightcurve
Discovery
Discovered by	Max Wolf
Discovery date	23 August 1892
Designations
MPC designation	(334) Chicago
Named after	Chicago
Alternative designations	1892 L
Minor planet category	Main belt
Adjectives	Chicagoan /ʃɪˈkɑːɡoʊən/
Orbital characteristics[1]
	Epoch 31 July 2016 (JD 2457600.5)
	Uncertainty parameter 0
Observation arc	123.39 yr (45069 d)
Aphelion	3.98201 AU (595.700 Gm)
Perihelion	3.80814 AU (569.690 Gm)
Semi-major axis	3.89507 AU (582.694 Gm)
Eccentricity	0.022319
Orbital period (sidereal)	7.69 yr (2807.8 d)
Mean anomaly	110.236°
Mean motion	0° 7m 41.567s / day
Inclination	4.64130°
Longitude of ascending node	130.179°
Argument of perihelion	148.310°
Physical characteristics
Dimensions	198.77±5.7 km[1]; 167.26 ± 7.27 km[2]
Mass	(5.06 ± 5.63) × 1018 kg[2]
Synodic rotation period	7.361 h (0.3067 d)
Geometric albedo	0.041±0.013
Spectral type	C
Absolute magnitude (H)	7.7

Chicago (minor planet designation: 334 Chicago) is a very large main-belt asteroid. It is classified as a C-type asteroid and is probably composed of carbonaceous material.

It was discovered by Max Wolf on August 23, 1892, in Heidelberg.

During 1999, the asteroid was observed occulting a star. The resulting chords provided a cross-section diameter estimate of 174.1 km.[3]

References

"334 Chicago (1892 L)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009, S2CID 119226456. See Table 1.
Shevchenko, Vasilij G.; Tedesco, Edward F. (September 2006), "Asteroid albedos deduced from stellar occultations", Icarus, 184 (1): 211–220, Bibcode:2006Icar..184..211S, doi:10.1016/j.icarus.2006.04.006.

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