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18051 (1999 RU196)
Classification: Main-belt Asteroid          SPK-ID: 2018051
[ 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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02457461045140215 3.4877e-08  
a 3.007778853189882 1.567e-08 au
q 2.933863859548776 1.1118e-07 au
i 9.564299468784974 5.1837e-06 deg
node 225.0971796336036 2.834e-05 deg
peri 225.1127465088146 0.00014418 deg
M 283.6941060564994 0.00014251 deg
tp 2459604.352581306637
(2022-Jan-24.85258131)		 0.00075523 TDB
period 1905.317161712811
5.22		 1.489e-05
4.077e-08		 d
yr
n .1889449206852118 1.4766e-09 deg/d
Q 3.081693846830989 1.6055e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1900  
   data-arc span      14148 days (38.74 yr)  
   first obs. used      1982-05-15  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46489  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:21:08  

Additional Information
 Earth MOID = 1.95575 au 
 Jupiter MOID = 2.00623 au 
 T_jup = 3.229 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457452.5 (2016-Mar-05.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02385003486678362 3.6935e-08  
q 2.937657039813134 1.1845e-07 au
tp 2457646.898741709794
(2016-Sep-15.39874171)		 0.00076144 TDB
node 225.1994630085906 2.8264e-05 deg
peri 215.6387879777598 0.00014641 deg
i 9.575019258737699 5.1971e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      1900  
   data-arc span      14148 days (38.74 yr)  
   first obs. used      1982-05-15  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46489  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:21:08  

Additional Information
 Jupiter MOID = 2.00623 au 
 T_jup = 3.229 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.364169165627721E-15 -4.343361026118064E-15 -9.62471274310226E-12 -2.535627423959669E-15 -1.740131696298519E-12 -1.257604396719488E-15
q -4.343361026118064E-15 1.403151619842366E-14 3.301668926825614E-11 9.460379418214504E-15 5.984789413021172E-12 4.675326199947476E-15
tp -9.62471274310226E-12 3.301668926825614E-11 5.797972721118757E-7 7.824390488549466E-11 1.094113630241593E-7 8.155294487618488E-11
node -2.535627423959669E-15 9.460379418214504E-15 7.824390488549466E-11 7.988373987253553E-10 -7.724751804145918E-10 -9.015290470598798E-11
peri -1.740131696298519E-12 5.984789413021172E-12 1.094113630241593E-7 -7.724751804145918E-10 2.143509162489428E-8 1.04260498182256E-10
i -1.257604396719488E-15 4.675326199947476E-15 8.155294487618488E-11 -9.015290470598798E-11 1.04260498182256E-10 2.700963643758414E-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 13.45   n/a E2021B10  
diameter diameter 6.639 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.210   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18051 (1999 RU196)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 RU196 = 1982 JT2 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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