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(2020 UN4)
Classification: Apollo [NEO]          SPK-ID: 54076021
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 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4948953194210144 0.00052569  
a 1.890810130044253 0.0019125 au
q .9550570467715126 4.1519e-05 au
i 2.155932731401415 0.0020303 deg
node 213.9588755228386 0.00085726 deg
peri 142.8204270679106 0.01011 deg
M 30.82029776885062 0.048567 deg
tp 2459119.197362046345
(2020-Sep-26.69736205)
0.0080249 TDB
period 949.6647268897357
2.60
1.4408
0.003945
d
yr
n .3790811533866721 0.00057514 deg/d
Q 2.826563213316993 0.002859 au
  Orbit Determination Parameters
   # obs. used (total)      29  
   data-arc span      1 day  
   first obs. used      2020-10-23  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .62918  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-23 20:42:13  

Additional Information
 Earth MOID = .00524431 au 
 Jupiter MOID = 2.63079 au 
 T_jup = 3.799 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459146.5 (2020-Oct-24.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4954693847658304 0.00052476  
q .9548018248355763 4.1178e-05 au
tp 2459119.171128946994
(2020-Sep-26.67112895)
0.0080628 TDB
node 213.9644196020218 0.00085593 deg
peri 142.7657383943005 0.010083 deg
i 2.15569871878084 0.0020311 deg
  Orbit Determination Parameters
   # obs. used (total)      29  
   data-arc span      1 day  
   first obs. used      2020-10-23  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .62918  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-23 20:42:13  

Additional Information
 Jupiter MOID = 2.63079 au 
 T_jup = 3.799 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.753728872127549E-7 -1.465333643387001E-8 2.349554421780681E-6 -8.925490333936567E-9 -4.725424554968995E-7 1.021464286487996E-6
q -1.465333643387001E-8 1.695622548675644E-9 7.789795999034568E-8 -2.482739266909592E-8 3.290127325089989E-7 -3.708437490657082E-8
tp 2.349554421780681E-6 7.789795999034568E-8 6.50091732161791E-5 -5.682180857359113E-6 6.329586802962932E-5 1.254094861338428E-5
node -8.925490333936567E-9 -2.482739266909592E-8 -5.682180857359113E-6 7.326184312504719E-7 -8.412683936836719E-6 -5.284253278858175E-7
peri -4.725424554968995E-7 3.290127325089989E-7 6.329586802962932E-5 -8.412683936836719E-6 .0001016629497328342 3.994160184055601E-6
i 1.021464286487996E-6 -3.708437490657082E-8 1.254094861338428E-5 -5.284253278858175E-7 3.994160184055601E-6 4.125201202195743E-6

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 28.00   .34702 E2020-UK5 autocmod 2.8

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