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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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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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457117.5 (2015-Apr-05.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .231081533839853 3.7197e-08  
q 1.819920739717409 9.1791e-08 au
tp 2456704.363315470774
(2014-Feb-15.86331547)
4.6595e-05 TDB
node 114.9241805506904 9.2856e-05 deg
peri 191.6558939215489 9.3647e-05 deg
i 3.284100081838515 4.3171e-06 deg
  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
 Jupiter MOID = 2.34764 au 
 T_jup = 3.509 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.383645251721107E-15 -3.387650018183549E-15 -1.819578313487378E-14 -5.897231718668251E-15 1.097312787456401E-15 5.877522921038161E-16
q -3.387650018183549E-15 8.425503596917996E-15 5.981741068454314E-14 1.318441250290702E-14 1.084671121569919E-14 -1.225357699594557E-15
tp -1.819578313487378E-14 5.981741068454314E-14 2.1711199449737E-9 -2.163320510746566E-11 5.972289305969281E-10 -4.360891101877906E-13
node -5.897231718668251E-15 1.318441250290702E-14 -2.163320510746566E-11 8.622180008203994E-9 -8.613432298357619E-9 -8.701310394454601E-12
peri 1.097312787456401E-15 1.084671121569919E-14 5.972289305969281E-10 -8.613432298357619E-9 8.769757291418553E-9 8.579511095694908E-12
i 5.877522921038161E-16 -1.225357699594557E-15 -4.360891101877906E-13 -8.701310394454601E-12 8.579511095694908E-12 1.863721410267172E-11

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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