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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2908041713096134 5.8194e-08  
a 2.749376427349008 1.4449e-08 au
q 1.949846293775594 1.65e-07 au
i 1.799518518124762 5.7281e-06 deg
node 210.2001214724233 0.00012241 deg
peri 168.3065606865472 0.00012255 deg
M 203.0909926204517 7.0586e-06 deg
tp 2459726.263475560150
(2022-May-26.76347556)
3.6485e-05 TDB
period 1665.136091069995
4.56
1.3127e-05
3.594e-08
d
yr
n .2161985449301436 1.7044e-09 deg/d
Q 3.548906560922422 1.8651e-08 au
  Orbit Determination Parameters
   # obs. used (total)      723  
   data-arc span      12639 days (34.60 yr)  
   first obs. used      1985-09-20  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53344  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 13:04:28  

Additional Information
 Earth MOID = .95206 au 
 Jupiter MOID = 1.91629 au 
 T_jup = 3.283 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457486.5 (2016-Apr-08.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2902881817387004 5.8135e-08  
q 1.95183333651057 1.6475e-07 au
tp 2458061.592883042279
(2017-Nov-04.09288304)
2.8772e-05 TDB
node 210.2074572037616 0.00012241 deg
peri 168.4676367638106 0.00012256 deg
i 1.799126634629993 5.7273e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      723  
   data-arc span      12639 days (34.60 yr)  
   first obs. used      1985-09-20  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53344  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 13:04:28  

Additional Information
 Jupiter MOID = 1.91629 au 
 T_jup = 3.283 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.379707119943271E-15 -9.563111427429258E-15 -5.072551918527511E-13 -1.170669256593925E-14 -1.171562255654021E-13 -1.1600888565619E-15
q -9.563111427429258E-15 2.71421446965844E-14 1.52442330888801E-12 3.355983512679948E-14 3.394098667479286E-13 3.485618079069573E-15
tp -5.072551918527511E-13 1.52442330888801E-12 8.27812511135633E-10 3.427504948987069E-12 1.812765840424568E-10 -1.467846114977921E-13
node -1.170669256593925E-14 3.355983512679948E-14 3.427504948987069E-12 1.498430710788404E-8 -1.497558469255638E-8 -1.864422857186836E-10
peri -1.171562255654021E-13 3.394098667479286E-13 1.812765840424568E-10 -1.497558469255638E-8 1.501986923126194E-8 1.863211642813705E-10
i -1.1600888565619E-15 3.485618079069573E-15 -1.467846114977921E-13 -1.864422857186836E-10 1.863211642813705E-10 3.280145614537619E-11

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 15.4   n/a MPO436249  

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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