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(2018 XH1)
Classification: Apollo [NEO]          SPK-ID: 3836747
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 2458462.5 (2018-Dec-10.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4460719299027225 0.00077455  
a 1.782898964824741 0.002507 au
q .9875977827638028 1.555e-05 au
i 4.789985519471884 0.0067422 deg
node 67.7774741591046 0.0031009 deg
peri 34.29048335438873 0.0074229 deg
M 351.1899511389885 0.019566 deg
tp 2458483.779643228956
(2018-Dec-31.27964323)
0.0039151 TDB
period 869.5379200819359
2.38
1.8341
0.005021
d
yr
n .4140129966569802 0.00087325 deg/d
Q 2.57820014688568 0.0036254 au
  Orbit Determination Parameters
   # obs. used (total)      42  
   data-arc span      2 days  
   first obs. used      2018-12-09  
   last obs. used      2018-12-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .39059  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 20:55:51  

Additional Information
 Earth MOID = .0297907 au 
 Jupiter MOID = 2.60819 au 
 T_jup = 3.963 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 5.999278399516264E-7 5.971380995718218E-9 -1.732016171639902E-6 -2.079471797904317E-6 3.618244666849314E-6 5.104512884219474E-6
q 5.971380995718218E-9 2.4181183394226E-10 -6.059996313788569E-8 1.090623378759783E-10 -4.183463194928902E-8 6.995118942261133E-8
tp -1.732016171639902E-6 -6.059996313788569E-8 1.532796268495351E-5 1.060783280439907E-6 8.078505050786145E-6 -1.927827954894699E-5
node -2.079471797904317E-6 1.090623378759783E-10 1.060783280439907E-6 9.615586894866101E-6 -2.145248934272772E-5 -1.548899702536211E-5
peri 3.618244666849314E-6 -4.183463194928902E-8 8.078505050786145E-6 -2.145248934272772E-5 5.509871189071328E-5 2.26051144935362E-5
i 5.104512884219474E-6 6.995118942261133E-8 -1.927827954894699E-5 -1.548899702536211E-5 2.26051144935362E-5 4.545672317612607E-5

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 25.8   .43885 E2018Y96 autocmod 2.6q

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