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(2018 XL1)
Classification: Apollo [NEO]          SPK-ID: 3836748
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4535210163755446 0.00021215  
a 1.809211422056729 0.00071693 au
q .988696019087317 7.9628e-06 au
i 2.528425949032548 0.0010684 deg
node 254.4543036355614 6.0645e-05 deg
peri 192.4045764829219 0.00070752 deg
M 14.84986625329938 0.22237 deg
tp 2459359.834935813390
(2021-May-25.33493581)
0.52726 TDB
period 888.8580463980305
2.43
0.52834
0.001447
d
yr
n .4050140530975089 0.00024074 deg/d
Q 2.629726825026141 0.0010421 au
  Orbit Determination Parameters
   # obs. used (total)      63  
   data-arc span      4 days  
   first obs. used      2018-12-10  
   last obs. used      2018-12-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .45782  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:51  

Additional Information
 Earth MOID = .00779595 au 
 Jupiter MOID = 2.61797 au 
 T_jup = 3.926 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458463.5 (2018-Dec-11.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4581339099772832 0.00021149  
q .9874450797947409 1.4527e-06 au
tp 2458470.061693892313
(2018-Dec-17.56169389)
0.000433 TDB
node 254.8833070386365 0.00032797 deg
peri 191.4355550690912 0.00029142 deg
i 2.661399601426402 0.00095737 deg
  Orbit Determination Parameters
   # obs. used (total)      63  
   data-arc span      4 days  
   first obs. used      2018-12-10  
   last obs. used      2018-12-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .45782  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:51  

Additional Information
 Jupiter MOID = 2.61797 au 
 T_jup = 3.926 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.472803410155775E-8 3.069372784369949E-10 -8.996614360557776E-8 -6.883067979612434E-8 5.512791315751286E-8 2.023921520865504E-7
q 3.069372784369949E-10 2.110361006461791E-12 -6.223522210078053E-10 -4.706722450490696E-10 3.706325436700929E-10 1.389975598720618E-9
tp -8.996614360557776E-8 -6.223522210078053E-10 1.874863648623529E-7 1.359929468245853E-7 -1.005732188030923E-7 -4.086009110065929E-7
node -6.883067979612434E-8 -4.706722450490696E-10 1.359929468245853E-7 1.075624845318297E-7 -8.941574274055646E-8 -3.104048255599019E-7
peri 5.512791315751286E-8 3.706325436700929E-10 -1.005732188030923E-7 -8.941574274055646E-8 8.492669398488896E-8 2.465885751053152E-7
i 2.023921520865504E-7 1.389975598720618E-9 -4.086009110065929E-7 -3.104048255599019E-7 2.465885751053152E-7 9.165524107031483E-7

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 27.0   .47643 E2018Y42 autocmod 2.6q

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