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JPL Small-Body Database Browser
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(2018 XJ1)
Classification: Apollo [NEO]          SPK-ID: 3836745
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4305211656610609 4.6986e-06  
a 1.752955728806946 1.488e-05 au
q .9982711850887451 2.407e-07 au
i 5.485701009827512 4.9397e-05 deg
node 84.01006645578106 1.768e-05 deg
peri 359.9498255662082 8.5609e-05 deg
M 34.07084359582097 0.0050261 deg
tp 2459316.270287665047
(2021-Apr-11.77028767)
0.010814 TDB
period 847.7247227340672
2.32
0.010794
2.955e-05
d
yr
n .4246661567671805 5.4072e-06 deg/d
Q 2.507640272525147 2.1286e-05 au
  Orbit Determination Parameters
   # obs. used (total)      45  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      10 days  
   first obs. used      2018-12-09  
   last obs. used      2018-12-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .37757  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:51  

Additional Information
 Earth MOID = .014375 au 
 Jupiter MOID = 2.75027 au 
 T_jup = 4.011 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458463.5 (2018-Dec-11.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4336018772999521 4.7086e-06  
q .9970720276611795 1.3362e-07 au
tp 2458467.870020894437
(2018-Dec-15.37002089)
6.9824e-05 TDB
node 84.0666774186198 1.7545e-05 deg
peri 359.5800477399365 8.4469e-05 deg
i 5.481158701637616 4.9815e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      45  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      10 days  
   first obs. used      2018-12-09  
   last obs. used      2018-12-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .37757  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:51  

Additional Information
 Jupiter MOID = 2.75027 au 
 T_jup = 4.011 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.217111765398968E-11 6.075248776113669E-13 -2.679552075546582E-11 3.446723762195353E-11 -3.939534820475042E-11 2.195043575746758E-10
q 6.075248776113669E-13 1.785349751302221E-14 -2.294579612699217E-12 1.046925114918484E-12 -3.02907968494767E-12 5.946401104133928E-12
tp -2.679552075546582E-11 -2.294579612699217E-12 4.875415698629459E-9 -9.60413378439722E-11 5.790088254534884E-9 4.066403324586103E-10
node 3.446723762195353E-11 1.046925114918484E-12 -9.60413378439722E-11 3.078257234797655E-10 -3.80128716339661E-10 1.66441118869775E-10
peri -3.939534820475042E-11 -3.02907968494767E-12 5.790088254534884E-9 -3.80128716339661E-10 7.135018786032029E-9 5.685805423451455E-10
i 2.195043575746758E-10 5.946401104133928E-12 4.066403324586103E-10 1.66441118869775E-10 5.685805423451455E-10 2.481486607187295E-9

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 26.4   .39187 E2018Y42 autocmod 2.6q

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