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183618 (2003 US221)
Classification: Main-belt Asteroid          SPK-ID: 2183618
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2301337839488061 3.7098e-08  
a 2.367379713257196 1.5451e-08 au
q 1.822565661801678 9.1512e-08 au
i 3.282559980947274 4.313e-06 deg
node 114.8709357461417 9.2956e-05 deg
peri 191.9084564889651 9.3759e-05 deg
M 260.8652032647785 1.4272e-05 deg
tp 2459366.873395172488
(2021-Jun-01.37339517)		 5.4455e-05 TDB
period 1330.455365882997
3.64		 1.3025e-05
3.566e-08		 d
yr
n .2705840490643405 2.6491e-09 deg/d
Q 2.912193764712715 1.9007e-08 au
   Orbit Determination Parameters
   # obs. used (total)      316  
   data-arc span      10061 days (27.55 yr)  
   first obs. used      1992-10-01  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64393  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 04:39:52  

Additional Information
 Earth MOID = .80779 au 
 Jupiter MOID = 2.34798 au 
 T_jup = 3.509 
[ 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 16.9   n/a MPO417992  

183618 (2003 US221)          Discovered 2003-Oct-22 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 2003 US221 = 2006 KB22 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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