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(2004 US1)
Classification: Apollo [NEO]          SPK-ID: 3258075
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4513179701820671 0.00031695  
a 1.284574727641649 0.00065529 au
q .7048230690152383 4.7625e-05 au
i 21.40966919084602 0.017983 deg
node 223.3540522854807 0.00038128 deg
peri 74.28488613617657 0.001711 deg
M 302.2755881107529 2.9369 deg
tp 2459085.769654517134
(2020-Aug-24.26965452)
4.4036 TDB
period 531.7867193703967
1.46
0.40691
0.001114
d
yr
n .676963126168736 0.000518 deg/d
Q 1.86432638626806 0.00095104 au
  Orbit Determination Parameters
   # obs. used (total)      85  
   data-arc span      28 days  
   first obs. used      2004-10-18  
   last obs. used      2004-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .57993  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:11:57  

Additional Information
 Earth MOID = .0653453 au 
 Jupiter MOID = 3.4935 au 
 T_jup = 4.876 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453307.5 (2004-Oct-29.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4512550790368576 0.00032227  
q .7050665318499159 9.5717e-05 au
tp 2453235.720888107881
(2004-Aug-18.22088811)
0.016743 TDB
node 223.4501607548458 0.00072603 deg
peri 74.20023379603619 0.0091825 deg
i 21.40714317140926 0.017439 deg
  Orbit Determination Parameters
   # obs. used (total)      85  
   data-arc span      28 days  
   first obs. used      2004-10-18  
   last obs. used      2004-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .57993  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:11:57  

Additional Information
 Jupiter MOID = 3.4935 au 
 T_jup = 4.876 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.038603854639309E-7 -3.084462793960095E-8 5.395881130418368E-6 2.339002217931956E-7 2.958494542518947E-6 5.620045202798489E-6
q -3.084462793960095E-8 9.16166360865624E-9 -1.602377445056258E-6 -6.946377747847514E-8 -8.783731294348838E-7 -1.66910657625988E-6
tp 5.395881130418368E-6 -1.602377445056258E-6 .0002803429346910146 1.215179400092058E-5 .0001537227696946042 .000291970348945891
node 2.339002217931956E-7 -6.946377747847514E-8 1.215179400092058E-5 5.271129409791095E-7 6.662376799929503E-6 1.265615824450244E-5
peri 2.958494542518947E-6 -8.783731294348838E-7 .0001537227696946042 6.662376799929503E-6 8.431884613731125E-5 .000160075895068097
i 5.620045202798489E-6 -1.66910657625988E-6 .000291970348945891 1.265615824450244E-5 .000160075895068097 .0003041257922526885

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 20.8   n/a MPO230202  

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