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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 168 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02394773097799908 1.9349e-08  
a 3.888019614670872 1.8019e-08 au
q 3.79491036690155 7.248e-08 au
i 4.643542553090851 1.6268e-06 deg
node 130.169826608661 6.2002e-06 deg
peri 150.6942708748765 4.64e-05 deg
M 338.5237669832731 4.2558e-05 deg
tp 2459563.550086307216
(2021-Dec-15.05008631)
0.00033097 TDB
period 2800.21319491919
7.67
1.9466e-05
5.33e-08
d
yr
n .1285616397541434 8.9372e-10 deg/d
Q 3.981128862440194 1.845e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3643  
   data-arc span      47101 days (128.96 yr)  
   first obs. used      1892-08-24  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42054  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:29:44  

Additional Information
 Earth MOID = 2.77919 au 
 Jupiter MOID = 1.07717 au 
 T_jup = 3.061 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456031.5 (2012-Apr-14.0) TDB
Reference: JPL 168 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02197167476724691 1.928e-08  
q 3.807974741393138 7.2238e-08 au
tp 2456766.182194115038
(2014-Apr-18.68219412)
0.00036688 TDB
node 130.2126591456569 6.2057e-06 deg
peri 151.7529436279436 5.0669e-05 deg
i 4.641055301150218 1.6258e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3643  
   data-arc span      47101 days (128.96 yr)  
   first obs. used      1892-08-24  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42054  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:29:44  

Additional Information
 Jupiter MOID = 1.07717 au 
 T_jup = 3.061 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.71709332664949E-16 -1.352025603037522E-15 -1.978265879235966E-12 -1.60845439142856E-14 -2.681518347325041E-13 4.016655552844566E-16
q -1.352025603037522E-15 5.218376057490154E-15 6.999246828990181E-12 6.495746087075637E-14 9.466565772621624E-13 -1.172807071068757E-15
tp -1.978265879235966E-12 6.999246828990181E-12 1.346020481846735E-7 -6.092091131511328E-10 1.84753169772453E-8 -9.613186744793026E-11
node -1.60845439142856E-14 6.495746087075637E-14 -6.092091131511328E-10 3.851091666436441E-11 -1.161934006968043E-10 4.646051397839764E-12
peri -2.681518347325041E-13 9.466565772621624E-13 1.84753169772453E-8 -1.161934006968043E-10 2.567342021974109E-9 -1.700446471040664E-11
i 4.016655552844566E-16 -1.172807071068757E-15 -9.613186744793026E-11 4.646051397839764E-12 -1.700446471040664E-11 2.643334745933106E-12

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 7.65   n/a E2021B10  
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. 2020-October); 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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