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386454 (2008 XM)
Classification: Apollo [NEO, PHA]          SPK-ID: 2386454
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | 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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9091508729483883 3.8927e-08  
a 1.222241817374415 1.7173e-08 au
q .1110396021544411 4.8408e-08 au
i 5.445419592004135 1.8706e-05 deg
node 240.6145234209124 9.7164e-05 deg
peri 27.38501260979771 9.5906e-05 deg
M 359.900912071531 5.9178e-05 deg
tp 2459200.635847729098
(2020-Dec-17.13584773)
8.1135e-05 TDB
period 493.5533846654963
1.35
1.0402e-05
2.848e-08
d
yr
n .7294043789082482 1.5372e-08 deg/d
Q 2.333444032594389 3.2785e-08 au
  Orbit Determination Parameters
   # obs. used (total)      89  
   data-arc span      1884 days (5.16 yr)  
   first obs. used      2008-12-02  
   last obs. used      2014-01-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56684  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 11:09:06  

Additional Information
 Earth MOID = .00470936 au 
 Jupiter MOID = 2.79297 au 
 T_jup = 4.659 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455427.5 (2010-Aug-19.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9090634992599027 3.8984e-08  
q .1111425213804025 4.8445e-08 au
tp 2455251.973853622957
(2010-Feb-24.47385362)
7.3432e-06 TDB
node 240.7171043756466 9.6645e-05 deg
peri 27.2708587793971 9.5384e-05 deg
i 5.458156206044794 1.874e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      89  
   data-arc span      1884 days (5.16 yr)  
   first obs. used      2008-12-02  
   last obs. used      2014-01-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56684  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 11:09:06  

Additional Information
 Jupiter MOID = 2.79297 au 
 T_jup = 4.659 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.519725118967976E-15 -1.887901689046657E-15 -7.943330749249211E-15 3.49413287567241E-13 -1.069932003551546E-13 5.535726544117099E-14
q -1.887901689046657E-15 2.346887769821808E-15 1.003248172889898E-14 -4.380917742580202E-13 1.354411188021575E-13 -6.748903026838653E-14
tp -7.943330749249211E-15 1.003248172889898E-14 5.392225119256447E-11 5.948214713556515E-11 -2.270853192303727E-11 6.859949381364116E-11
node 3.49413287567241E-13 -4.380917742580202E-13 5.948214713556515E-11 9.340210326156313E-9 -9.171553549336494E-9 7.798109197760109E-10
peri -1.069932003551546E-13 1.354411188021575E-13 -2.270853192303727E-11 -9.171553549336494E-9 9.098144379594488E-9 -7.050181852305981E-10
i 5.535726544117099E-14 -6.748903026838653E-14 6.859949381364116E-11 7.798109197760109E-10 -7.050181852305981E-10 3.511781026909733E-10

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 20.0   n/a MPO282312  
diameter diameter 0.367 km 0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2014ApJ...784..110M)  
geometric albedo albedo 0.128   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2014ApJ...784..110M)  

386454 (2008 XM)          Discovered 2008-Dec-02 by LINEAR at Socorro
Reference: Last Updated: 2014-02-19

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