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(2008 VR4)
Classification: Aten [NEO]          SPK-ID: 3437805
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | 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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3880320651392269 7.9346e-06  
a .9217417076110472 2.9932e-08 au
q .5640763692817752 7.3316e-06 au
i 4.192935417587901 0.00010885 deg
node 37.00356256406112 0.00015701 deg
peri 235.3531276266146 0.00023702 deg
M 108.654691205796 0.0004552 deg
tp 2458902.943038181053
(2020-Feb-23.44303818)
0.00041342 TDB
period 323.2304640054737
0.88
1.5744e-05
4.31e-08
d
yr
n 1.113756406307989 5.425e-08 deg/d
Q 1.279407045940319 4.1546e-08 au
  Orbit Determination Parameters
   # obs. used (total)      28  
   data-arc span      2921 days (8.00 yr)  
   first obs. used      2008-11-07  
   last obs. used      2016-11-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .74871  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 09:02:14  

Additional Information
 Earth MOID = .00202265 au 
 Jupiter MOID = 3.82647 au 
 T_jup = 6.419 
[ show covariance matrix ]

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 23.0   n/a MPO149146  

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