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412976 (1987 WC)
Classification: Amor [NEO]          SPK-ID: 2412976
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 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2338572748775365 5.9935e-08  
a 1.362323440667113 5.5104e-09 au
q 1.043734193330913 8.1497e-08 au
i 15.84408075252353 1.0121e-05 deg
node 51.82889209112413 1.1816e-05 deg
peri 308.3368588457843 1.8737e-05 deg
M 329.0819270601811 1.593e-05 deg
tp 2459250.380257579893
(2021-Feb-04.88025758)
2.5879e-05 TDB
period 580.7895195704427
1.59
3.5238e-06
9.648e-09
d
yr
n .6198458957493919 3.7608e-09 deg/d
Q 1.680912688003314 6.7991e-09 au
  Orbit Determination Parameters
   # obs. used (total)      183  
   data-arc span      11838 days (32.41 yr)  
   first obs. used      1987-11-21  
   last obs. used      2020-04-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52113  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 12:59:39  

Additional Information
 Earth MOID = .115081 au 
 Jupiter MOID = 3.82085 au 
 T_jup = 4.777 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457019.5 (2014-Dec-28.0) TDB
Reference: JPL 51 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2338284811492277 5.9923e-08  
q 1.043713459411103 8.1486e-08 au
tp 2456927.262633396745
(2014-Sep-26.76263340)
2.0906e-05 TDB
node 51.85764067347925 1.1817e-05 deg
peri 308.2927125830483 1.8737e-05 deg
i 15.84345553377256 1.0121e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      183  
   data-arc span      11838 days (32.41 yr)  
   first obs. used      1987-11-21  
   last obs. used      2020-04-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52113  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 12:59:39  

Additional Information
 Jupiter MOID = 3.82085 au 
 T_jup = 4.777 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.590706197329354E-15 -4.876307830332265E-15 7.110887291254385E-13 1.165478408137913E-13 3.083729826101565E-13 -8.343413007774163E-14
q -4.876307830332265E-15 6.640008846557186E-15 -9.637248781456708E-13 -1.594297509143991E-13 -4.163586895810326E-13 1.138707461609348E-13
tp 7.110887291254385E-13 -9.637248781456708E-13 4.370604495193394E-10 3.86398111465876E-11 2.989483512333408E-10 -2.916480589896976E-11
node 1.165478408137913E-13 -1.594297509143991E-13 3.86398111465876E-11 1.396489380076446E-10 -1.062991552023786E-10 2.210779214676651E-12
peri 3.083729826101565E-13 -4.163586895810326E-13 2.989483512333408E-10 -1.062991552023786E-10 3.510835236797081E-10 -2.462041373386698E-11
i -8.343413007774163E-14 1.138707461609348E-13 -2.916480589896976E-11 2.210779214676651E-12 -2.462041373386698E-11 1.024288033183299E-10

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 19.89   n/a E2021B25  

412976 (1987 WC)          Discovered 1987-Nov-21 by Mueller, J. E. at Palomar
Reference: Last Updated: 2014-11-10

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