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(2018 PK21)
Classification: Aten [NEO]          SPK-ID: 3826775
[ 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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08091124210153032 3.7339e-06  
a .9883532171296608 6.8347e-07 au
q .9083843306966565 4.3185e-06 au
i 1.194451617520497 6.055e-05 deg
node 304.5057431070394 0.00028302 deg
peri 223.0796763920009 0.00072288 deg
M 87.71104964315759 0.00067096 deg
tp 2458913.058317642443
(2020-Mar-04.55831764)		 0.00075409 TDB
period 358.8944126970231
0.98		 0.00037228
1.019e-06		 d
yr
n 1.003080536402527 1.0405e-06 deg/d
Q 1.068322103562665 7.3877e-07 au
   Orbit Determination Parameters
   # obs. used (total)      100  
   data-arc span      439 days (1.20 yr)  
   first obs. used      2018-08-11  
   last obs. used      2019-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .49011  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Oct-25 05:58:53  

Additional Information
 Earth MOID = .00775537 au 
 Jupiter MOID = 3.89364 au 
 T_jup = 6.133 
[ 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 25.9   .46799 MPO452057 autocmod 2.6n

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