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181903 (1999 RE237)
Classification: Main-belt Asteroid          SPK-ID: 2181903
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1269172180905171 3.3963e-08  
a 2.313277612416807 1.1405e-08 au
q 2.019682853177792 8.2392e-08 au
i 10.09139488953991 4.7062e-06 deg
node 139.2896439538509 2.3437e-05 deg
peri 290.5727285335236 3.2956e-05 deg
M 318.4568647839281 2.3374e-05 deg
tp 2459348.798523642077
(2021-May-14.29852364)
8.3583e-05 TDB
period 1285.109278186922
3.52
9.5037e-06
2.602e-08
d
yr
n .2801318192238881 2.0716e-09 deg/d
Q 2.606872371655822 1.2852e-08 au
  Orbit Determination Parameters
   # obs. used (total)      531  
   data-arc span      7796 days (21.34 yr)  
   first obs. used      1999-09-08  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56255  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:32  

Additional Information
 Earth MOID = 1.05913 au 
 Jupiter MOID = 2.64841 au 
 T_jup = 3.552 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457978.5 (2017-Aug-13.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1278262927874952 3.4297e-08  
q 2.017997775729437 8.3282e-08 au
tp 2458060.825657983921
(2017-Nov-03.32565798)
8.1694e-05 TDB
node 139.3643035814304 2.3476e-05 deg
peri 289.8850581311308 3.276e-05 deg
i 10.08244702092827 4.703e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      531  
   data-arc span      7796 days (21.34 yr)  
   first obs. used      1999-09-08  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56255  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:32  

Additional Information
 Jupiter MOID = 2.64841 au 
 T_jup = 3.552 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.176285387224602E-15 -2.838148322864851E-15 -1.234394396585845E-12 1.416660034887209E-14 -3.219426520150567E-13 1.964580000812231E-15
q -2.838148322864851E-15 6.935825813011796E-15 2.890896189135617E-12 -3.3730657589564E-14 7.50171246194374E-13 -4.262608130923652E-15
tp -1.234394396585845E-12 2.890896189135617E-12 6.673830550113966E-9 -5.489414210415265E-11 1.883503243382976E-9 -2.758085360954044E-12
node 1.416660034887209E-14 -3.3730657589564E-14 -5.489414210415265E-11 5.511355754482899E-10 -5.573148909346596E-10 5.534685851497041E-11
peri -3.219426520150567E-13 7.50171246194374E-13 1.883503243382976E-9 -5.573148909346596E-10 1.07319805942987E-9 -5.525264186913402E-11
i 1.964580000812231E-15 -4.262608130923652E-15 -2.758085360954044E-12 5.534685851497041E-11 -5.525264186913402E-11 2.211808452793878E-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 16.37   n/a E2021B55  

181903 (1999 RE237)          Discovered 1999-Sep-08 by CSS at Catalina
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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