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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2302200362280705 3.7093e-08  
a 2.36726766705119 1.5361e-08 au
q 1.822275218981125 9.1507e-08 au
i 3.282579633962924 4.313e-06 deg
node 114.8708031029371 9.296e-05 deg
peri 191.9269434458124 9.3762e-05 deg
M 314.9751563939643 1.4519e-05 deg
tp 2459366.886922341806
(2021-Jun-01.38692234)		 5.4448e-05 TDB
period 1330.360912903219
3.64		 1.2949e-05
3.545e-08		 d
yr
n .270603259993846 2.6339e-09 deg/d
Q 2.912260115121255 1.8897e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .6439  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:39:43  

Additional Information
 Earth MOID = .805508 au 
 Jupiter MOID = 2.34764 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 16.99   n/a E2021B55  

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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