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(2021 NL4)
Classification: Apollo [NEO]          SPK-ID: 54168303
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 2459407.5 (2021-Jul-12.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3896001126223868 0.0019182  
a 1.327141957105783 0.0029987 au
q .8100873011514752 0.00071533 au
i 4.022818689982328 0.015038 deg
node 331.1508604274784 0.033978 deg
peri 51.00205359670952 0.037903 deg
M 311.4198133683158 0.21216 deg
tp 2459482.858314141704
(2021-Sep-25.35831414)
0.073771 TDB
period 558.437399524517
1.53
1.8927
0.005182
d
yr
n .6446559637777178 0.0021849 deg/d
Q 1.844196613060091 0.0041671 au
  Orbit Determination Parameters
   # obs. used (total)      35  
   data-arc span      8 days  
   first obs. used      2021-07-10  
   last obs. used      2021-07-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .50076  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-19 05:49:57  

Additional Information
 Earth MOID = .0269665 au 
 Jupiter MOID = 3.62413 au 
 T_jup = 4.849 
[ 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 23.595   .46227 4 autocmod 2.9c

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