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66861 (1999 VN31)
Classification: Main-belt Asteroid          SPK-ID: 2066861
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2908877420732368 5.6154e-08  
a 2.749418752031489 1.4295e-08 au
q 1.949646539239232 1.5933e-07 au
i 1.799558367743651 5.5419e-06 deg
node 210.1994927256148 0.00011236 deg
peri 168.2858244177639 0.00011249 deg
M 246.3704665870133 7.0826e-06 deg
tp 2459726.091683921004
(2022-May-26.59168392)
3.5654e-05 TDB
period 1665.174541585651
4.56
1.2986e-05
3.555e-08
d
yr
n .2161935526933967 1.6861e-09 deg/d
Q 3.549190964823745 1.8453e-08 au
  Orbit Determination Parameters
   # obs. used (total)      762  
   data-arc span      12666 days (34.68 yr)  
   first obs. used      1985-09-20  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53379  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:25:24  

Additional Information
 Earth MOID = .950494 au 
 Jupiter MOID = 1.91718 au 
 T_jup = 3.283 
[ show covariance matrix ]

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 15.39   n/a E2021B10  

66861 (1999 VN31)          Discovered 1999-Nov-03 by LINEAR at Socorro
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 VN31 = 1985 SG4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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