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(2018 RB4)
Classification: Apollo [NEO]          SPK-ID: 3827431
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1121107255364344 0.0002386  
a 1.063754471628078 0.00020402 au
q .9444961860212279 7.2672e-05 au
i 5.400272033153082 0.013777 deg
node 337.3597416753211 0.0045252 deg
peri 101.5910629066146 0.019839 deg
M 125.9402982530191 0.12048 deg
tp 2458860.308158130127
(2020-Jan-11.80815813)
0.093777 TDB
period 400.7379986647329
1.10
0.11529
0.0003156
d
yr
n .8983425609738215 0.00025844 deg/d
Q 1.183012757234928 0.00022689 au
  Orbit Determination Parameters
   # obs. used (total)      26  
   data-arc span      20 days  
   first obs. used      2018-09-10  
   last obs. used      2018-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .26153  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Sep-30 06:45:38  

Additional Information
 Earth MOID = .0262375 au 
 Jupiter MOID = 3.91751 au 
 T_jup = 5.786 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458374.5 (2018-Sep-13.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1122946166099832 0.00023799  
q .9445540330411717 7.2411e-05 au
tp 2458459.971329931585
(2018-Dec-07.47132993)
0.024767 TDB
node 337.7459961068181 0.0017064 deg
peri 101.5398082162366 0.019633 deg
i 5.433375532759346 0.013613 deg
  Orbit Determination Parameters
   # obs. used (total)      26  
   data-arc span      20 days  
   first obs. used      2018-09-10  
   last obs. used      2018-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .26153  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Sep-30 06:45:38  

Additional Information
 Jupiter MOID = 3.91751 au 
 T_jup = 5.786 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.663706011215604E-8 -1.723164137324648E-8 -5.893401117825917E-6 4.041027851105983E-7 -4.671329349442434E-6 3.239592573698167E-6
q -1.723164137324648E-8 5.243281524715378E-9 1.792809966046595E-6 -1.229263140105586E-7 1.420921514843057E-6 -9.856162868528918E-7
tp -5.893401117825917E-6 1.792809966046595E-6 .0006133850174592391 -4.202502633770686E-5 .000486215094547991 -.0003370772611457831
node 4.041027851105983E-7 -1.229263140105586E-7 -4.202502633770686E-5 2.911949667785811E-6 -3.33390028081028E-5 2.313598192732238E-5
peri -4.671329349442434E-6 1.420921514843057E-6 .000486215094547991 -3.33390028081028E-5 .0003854578344123163 -.0002672016238655513
i 3.239592573698167E-6 -9.856162868528918E-7 -.0003370772611457831 2.313598192732238E-5 -.0002672016238655513 .0001853194913218081

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 26.9   .40279 E2018S72 autocmod 2.6n

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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