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12308 (1991 VB5)
Classification: Main-belt Asteroid          SPK-ID: 2012308
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1204917799560471 4.1542e-08  
a 2.547567404825503 8.3201e-09 au
q 2.24060647366007 1.079e-07 au
i 14.78663128031478 4.2822e-06 deg
node 194.7633751133014 1.1105e-05 deg
peri 187.745238715073 1.7257e-05 deg
M 32.95030506992742 1.2841e-05 deg
tp 2458864.561056167585
(2020-Jan-16.06105617)
5.2849e-05 TDB
period 1485.206879748545
4.07
7.2758e-06
1.992e-08
d
yr
n .2423904742893126 1.1874e-09 deg/d
Q 2.854528335990935 9.3226e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2293  
   data-arc span      10311 days (28.23 yr)  
   first obs. used      1991-11-04  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46693  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:18:30  

Additional Information
 Earth MOID = 1.2438 au 
 Jupiter MOID = 2.60422 au 
 T_jup = 3.386 
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Orbital Elements at Epoch 2456827.5 (2014-Jun-19.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1217969763710278 4.1759e-08  
q 2.236853384699874 1.0865e-07 au
tp 2457375.719472433644
(2015-Dec-19.21947243)
5.0785e-05 TDB
node 194.829525260141 1.1087e-05 deg
peri 186.9453091337655 1.7076e-05 deg
i 14.80018178652215 4.2867e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2293  
   data-arc span      10311 days (28.23 yr)  
   first obs. used      1991-11-04  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46693  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:18:30  

Additional Information
 Jupiter MOID = 2.60422 au 
 T_jup = 3.386 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.743843812784122E-15 -4.527367043769693E-15 -4.965393428814768E-13 1.714506383469854E-15 -7.11415774786639E-14 2.615473480660708E-15
q -4.527367043769693E-15 1.180404763031027E-14 1.293909899834608E-12 -4.67423402547739E-15 1.809982616116296E-13 -6.64020058821474E-15
tp -4.965393428814768E-13 1.293909899834608E-12 2.579140176424761E-9 -7.362161001086379E-12 6.604721294600546E-10 -5.305983529113927E-13
node 1.714506383469854E-15 -4.67423402547739E-15 -7.362161001086379E-12 1.229298078576513E-10 -1.202723668928321E-10 -3.214703769685227E-12
peri -7.11415774786639E-14 1.809982616116296E-13 6.604721294600546E-10 -1.202723668928321E-10 2.915910420479215E-10 3.07403704450612E-12
i 2.615473480660708E-15 -6.64020058821474E-15 -5.305983529113927E-13 -3.214703769685227E-12 3.07403704450612E-12 1.837615509308743E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO502262  
diameter diameter 6.134 km 0.232 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.225   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12308 (1991 VB5)          Discovered 1991-Nov-04 by Sugie, A. at Dynic
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 VB5 = 1998 MK8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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