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418849 (2008 WM64)
Classification: Apollo [NEO, PHA]          SPK-ID: 2418849
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 77 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1064507703590477 5.3963e-08  
a 1.005460019747564 4.3039e-10 au
q .8984280260802125 5.4229e-08 au
i 33.52735568234848 1.3055e-05 deg
node 91.44813633476858 1.1444e-06 deg
peri 256.6124614652408 3.2307e-06 deg
M 78.07298540037655 9.2952e-06 deg
tp 2459120.637312249173
(2020-Sep-28.13731225)
9.4832e-06 TDB
period 368.2524427989777
1.01
2.3645e-07
6.474e-10
d
yr
n .9775902564657729 6.2769e-10 deg/d
Q 1.112492013414915 4.7621e-10 au
  Orbit Determination Parameters
   # obs. used (total)      305  
   # delay obs. used      3  
   # Doppler obs. used      3  
   data-arc span      4436 days (12.15 yr)  
   first obs. used      2008-11-24  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37975  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 13:21:12  

Additional Information
 Earth MOID = .0348616 au 
 Jupiter MOID = 4.09537 au 
 T_jup = 5.904 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458117.5 (2017-Dec-30.0) TDB
Reference: JPL 77 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1067871972332088 5.3879e-08  
q .8974931557449618 5.3982e-08 au
tp 2458016.379989913631
(2017-Sep-19.87998991)
9.014e-06 TDB
node 91.46512543990997 1.137e-06 deg
peri 256.3863116506258 3.3071e-06 deg
i 33.53040388605351 1.3057e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      305  
   # delay obs. used      3  
   # Doppler obs. used      3  
   data-arc span      4436 days (12.15 yr)  
   first obs. used      2008-11-24  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37975  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 13:21:12  

Additional Information
 Jupiter MOID = 4.09537 au 
 T_jup = 5.904 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.902982133097849E-15 -2.908391895916927E-15 4.354315834984958E-13 2.45965753892721E-14 6.356937318173412E-14 1.806683071108298E-13
q -2.908391895916927E-15 2.914062289515591E-15 -4.344707538931126E-13 -2.427979214738066E-14 -6.228831730157135E-14 -1.763432628812692E-13
tp 4.354315834984958E-13 -4.344707538931126E-13 8.125173041362535E-11 7.353987312453914E-12 2.16004714052624E-11 6.233095166053478E-11
node 2.45965753892721E-14 -2.427979214738066E-14 7.353987312453914E-12 1.292660191132708E-12 3.007165744375705E-12 6.101605512094894E-12
peri 6.356937318173412E-14 -6.228831730157135E-14 2.16004714052624E-11 3.007165744375705E-12 1.093658811248631E-11 3.43493603122406E-11
i 1.806683071108298E-13 -1.763432628812692E-13 6.233095166053478E-11 6.101605512094894E-12 3.43493603122406E-11 1.704766934997318E-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 20.6   n/a MPO434525  
rotation period rot_per 2.4055 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Rowe, B. (2018) Minor Planet Bull. 45, 292-294.]
[Warner, B.D. (2018) Minor Planet Bull. 45, 138-147.]

418849 (2008 WM64)          Discovered 2008-Nov-24 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-01-07

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