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(2017 SP21)
Classification: Aten [NEO]          SPK-ID: 3782060
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1390555926771883 4.4198e-05  
a .9811091060649459 1.2937e-05 au
q .8446803978400985 3.2379e-05 au
i 11.19060294681193 0.003489 deg
node 188.2064590528016 0.00012414 deg
peri 69.13318635325489 0.0065842 deg
M 1.977138228219608 0.032449 deg
tp 2458998.550564280765
(2020-May-29.05056428)
0.031955 TDB
period 354.9558897338428
0.97
0.007021
1.922e-05
d
yr
n 1.014210527031794 2.0061e-05 deg/d
Q 1.117537814289793 1.4736e-05 au
  Orbit Determination Parameters
   # obs. used (total)      31  
   data-arc span      2 days  
   first obs. used      2017-09-30  
   last obs. used      2017-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      5  
   norm. resid. RMS      .55737  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Oct-07 15:42:11  

Additional Information
 Earth MOID = .00925914 au 
 Jupiter MOID = 3.89879 au 
 T_jup = 6.147 
[ show covariance matrix ]

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 27.8   n/a MPO421454  

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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