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334 Chicago (A892 QB)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000334
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 158 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02376148279553064 3.7704e-08  
a 3.88851895354717 2.0888e-08 au
q 3.796121977332365 1.502e-07 au
i 4.64353557156648 4.2004e-06 deg
node 130.1687276452977 5.1775e-05 deg
peri 149.8271084866966 0.0001009 deg
M 288.4435862083018 8.7926e-05 deg
tp 2459557.199489604923
(2021-Dec-08.69948960)
0.00068493 TDB
period 2800.752659868816
7.67
2.2567e-05
6.179e-08
d
yr
n .1285368769468068 1.0357e-09 deg/d
Q 3.980915929761976 2.1384e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3260  
   data-arc span      46730 days (127.94 yr)  
   first obs. used      1892-08-24  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43625  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:14:34  

Additional Information
 Earth MOID = 2.78072 au 
 Jupiter MOID = 1.07776 au 
 T_jup = 3.061 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.7   n/a MPO347513  
diameter diameter 198.770 km 5.597 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 7.361 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.]
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2003) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Jutzeler, E.C.; Hausel, E.; Leake, M.; Burke, A. (2007) J. SE Assoc. for Research in Astron. 1, 2-6.]
[Strabla, L.; Quadri, U.; Girelli, R. (2011) Minor Planet Bull. 38, 169-172.]
[Slyusarev, I.G.; Shevchenko, V.G.; Belskaya, I.N.; Krugly, Yu.N.; Chiorny, V.G. (2012) ACM 2012, #6398.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.041   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
B-V BV 0.736   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=5; phase (min.=5.04, mean=9.38, max.=14.21) deg.
U-B UB 0.358   0.028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=5.04, mean=9.48, max.=14.21) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

334 Chicago (A892 QB)          Discovered 1892-Aug-23 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A892 QB = A903 HA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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