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437218 (2012 WJ23)
Classification: Main-belt Asteroid          SPK-ID: 2437218
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2337294996396345 5.2252e-08  
a 2.619432722578818 3.303e-08 au
q 2.007194022990785 1.3299e-07 au
i 17.64334306197 8.2427e-06 deg
node 56.63816825103326 2.0345e-05 deg
peri 266.5301933711037 2.7741e-05 deg
M 354.1472890669149 1.9898e-05 deg
tp 2459025.674675058287
(2020-Jun-25.17467506)
8.5766e-05 TDB
period 1548.493189668935
4.24
2.9289e-05
8.019e-08
d
yr
n .2324840705802312 4.3973e-09 deg/d
Q 3.231671422166851 4.075e-08 au
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      7097 days (19.43 yr)  
   first obs. used      2001-02-22  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60547  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-26 00:39:43  

Additional Information
 Earth MOID = 1.08543 au 
 Jupiter MOID = 2.33962 au 
 T_jup = 3.301 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457613.5 (2016-Aug-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2335916363643989 5.2254e-08  
q 2.007423962238964 1.3315e-07 au
tp 2457479.058410908030
(2016-Mar-31.55841091)
8.0252e-05 TDB
node 56.64781181527015 2.0334e-05 deg
peri 266.8352790886029 2.7746e-05 deg
i 17.64907169532268 8.2459e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      7097 days (19.43 yr)  
   first obs. used      2001-02-22  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60547  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-26 00:39:43  

Additional Information
 Jupiter MOID = 2.33962 au 
 T_jup = 3.301 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.730500775920976E-15 -6.83965887621661E-15 1.329079592582207E-12 -1.057960585845264E-14 3.528507461049032E-13 -4.215513264117311E-15
q -6.83965887621661E-15 1.772977964393134E-14 -3.445243101631068E-12 2.901547420582269E-14 -9.071133930532727E-13 9.588172669702801E-15
tp 1.329079592582207E-12 -3.445243101631068E-12 6.440365393275497E-9 -3.116017434789855E-11 1.54908843449437E-9 -2.781571587338219E-11
node -1.057960585845264E-14 2.901547420582269E-14 -3.116017434789855E-11 4.134514795325289E-10 -4.006980053996135E-10 -5.304896271378471E-11
peri 3.528507461049032E-13 -9.071133930532727E-13 1.54908843449437E-9 -4.006980053996135E-10 7.698324277858651E-10 4.474950653246987E-11
i -4.215513264117311E-15 9.588172669702801E-15 -2.781571587338219E-11 -5.304896271378471E-11 4.474950653246987E-11 6.799421790909418E-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 16.5   n/a MPO437695  

437218 (2012 WJ23)          Discovered 2012-Nov-07 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-06-04

Alternate Designations
 2012 WJ23 = 2015 FR295 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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