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(2018 PK21)
Classification: Aten [NEO]          SPK-ID: 3826775
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08183920315646247 1.605e-06  
a .9853692498249392 1.4956e-07 au
q .9047274156043851 1.7187e-06 au
i 1.217171797465072 2.6796e-05 deg
node 302.886437649861 0.00027501 deg
peri 226.3501719589597 0.00010947 deg
M 286.8597196539694 0.00013923 deg
tp 2459273.085697522602
(2021-Feb-27.58569752)		 0.00012258 TDB
period 357.2703165001578
0.98		 8.134e-05
2.227e-07		 d
yr
n 1.007640387050853 2.2941e-07 deg/d
Q 1.066011084045493 1.618e-07 au
   Orbit Determination Parameters
   # obs. used (total)      112  
   data-arc span      833 days (2.28 yr)  
   first obs. used      2018-08-11  
   last obs. used      2020-11-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .47475  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-21 05:20:55  

Additional Information
 Earth MOID = .0055524 au 
 Jupiter MOID = 3.89421 au 
 T_jup = 6.148 
[ 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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