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JPL Small-Body Database Browser
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(2018 XW2)
Classification: Aten [NEO]          SPK-ID: 3836859
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .301885172347282 0.0005034  
a .9976658613341354 0.00031231 au
q .6964853308402804 0.00028443 au
i 19.73559514538671 0.04124 deg
node 78.15693153952745 0.0018078 deg
peri 249.8819491862679 0.02236 deg
M 279.2443378048525 0.56543 deg
tp 2459478.148192726756
(2021-Sep-20.64819273)
0.61002 TDB
period 363.9788044905454
1.00
0.17091
0.0004679
d
yr
n .9890685819024149 0.00046442 deg/d
Q 1.29884639182799 0.00040659 au
  Orbit Determination Parameters
   # obs. used (total)      42  
   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      .37969  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:57  

Additional Information
 Earth MOID = .0195269 au 
 Jupiter MOID = 4.03171 au 
 T_jup = 6.001 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458463.5 (2018-Dec-11.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3020039382430839 0.00052273  
q .6970256785141216 0.00026597 au
tp 2458385.696581436027
(2018-Sep-24.19658144)
0.055268 TDB
node 78.1802607973603 0.0022485 deg
peri 250.0441381404725 0.030532 deg
i 19.73129692608822 0.039789 deg
  Orbit Determination Parameters
   # obs. used (total)      42  
   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      .37969  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:57  

Additional Information
 Jupiter MOID = 4.03171 au 
 T_jup = 6.001 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.732485757931787E-7 -1.389589799798035E-7 2.88827097960938E-5 1.175240495870965E-6 1.591002932616018E-5 2.079689017841344E-5
q -1.389589799798035E-7 7.073980335265155E-8 -1.4677417805026E-5 -5.978773004199935E-7 -8.070335723927217E-6 -1.058009890416883E-5
tp 2.88827097960938E-5 -1.4677417805026E-5 .003054522114080388 .0001241913804427665 .001684745400016561 .002197649628256841
node 1.175240495870965E-6 -5.978773004199935E-7 .0001241913804427665 5.055611426386944E-6 6.836681458994453E-5 8.946327745463801E-5
peri 1.591002932616018E-5 -8.070335723927217E-6 .001684745400016561 6.836681458994453E-5 .0009321991129129263 .001209767104586408
i 2.079689017841344E-5 -1.058009890416883E-5 .002197649628256841 8.946327745463801E-5 .001209767104586408 .001583136642430445

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 25.5   .47383 E2018Y63 autocmod 2.6q

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