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(2018 XM2)
Classification: Apollo [NEO]          SPK-ID: 3836849
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 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2411386818824547 0.00057072  
a 1.248729802972059 0.00096542 au
q .9476127442560395 1.9991e-05 au
i 22.47900940800325 0.033705 deg
node 257.3946839742947 0.0019211 deg
peri 228.6283242943031 0.039279 deg
M 268.6915850652378 0.69849 deg
tp 2459525.773481570956
(2021-Nov-07.27348157)
1.1388 TDB
period 509.6841665556767
1.40
0.59107
0.001618
d
yr
n .7063197635366891 0.00081911 deg/d
Q 1.549846861688079 0.0011982 au
  Orbit Determination Parameters
   # obs. used (total)      44  
   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      .47005  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:57  

Additional Information
 Earth MOID = .0277426 au 
 Jupiter MOID = 3.64344 au 
 T_jup = 5.046 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458463.5 (2018-Dec-11.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2409138799154547 0.00057151  
q .9477568391988496 1.9006e-05 au
tp 2458506.294083972731
(2019-Jan-22.79408397)
0.042479 TDB
node 257.4161794305614 0.0019369 deg
peri 228.5629990214357 0.039353 deg
i 22.49497916697959 0.033693 deg
  Orbit Determination Parameters
   # obs. used (total)      44  
   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      .47005  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:57  

Additional Information
 Jupiter MOID = 3.64344 au 
 T_jup = 5.046 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.266266289526512E-7 1.08349118331281E-8 -2.427684671984701E-5 -1.106847171986873E-6 -2.248985414088009E-5 1.925346957225523E-5
q 1.08349118331281E-8 3.612362662785158E-10 -8.056824701860997E-7 -3.674206737733707E-8 -7.465426027662182E-7 6.392496792509767E-7
tp -2.427684671984701E-5 -8.056824701860997E-7 .001804487342535097 8.227101107341302E-5 .001671695969712225 -.001431113573473621
node -1.106847171986873E-6 -3.674206737733707E-8 8.227101107341302E-5 3.751388611096719E-6 7.62172338477911E-5 -6.525723050711546E-5
peri -2.248985414088009E-5 -7.465426027662182E-7 .001671695969712225 7.62172338477911E-5 .001548691935580941 -.00132581838784209
i 1.925346957225523E-5 6.392496792509767E-7 -.001431113573473621 -6.525723050711546E-5 -.00132581838784209 .001135203183457714

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 25.4   .5228 E2018Y42 autocmod 2.6q

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