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146720 (2001 WC87)
Classification: Main-belt Asteroid          SPK-ID: 2146720
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .175229811383974 3.6113e-08  
a 2.660482224461935 1.2128e-08 au
q 2.194286426079055 9.6027e-08 au
i 3.134653303255371 4.7098e-06 deg
node 313.6815266482731 8.0568e-05 deg
peri 159.2832886626674 8.2065e-05 deg
M 44.85380713674678 1.4431e-05 deg
tp 2458803.014242638219
(2019-Nov-15.51424264)
6.347e-05 TDB
period 1585.035411453316
4.34
1.0838e-05
2.967e-08
d
yr
n .2271242632175118 1.553e-09 deg/d
Q 3.126678022844816 1.4253e-08 au
  Orbit Determination Parameters
   # obs. used (total)      680  
   data-arc span      6764 days (18.52 yr)  
   first obs. used      2001-10-14  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58152  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 11:32:15  

Additional Information
 Earth MOID = 1.21114 au 
 Jupiter MOID = 1.98247 au 
 T_jup = 3.362 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456967.5 (2014-Nov-06.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1749313341751539 3.6365e-08  
q 2.19497500025208 9.6739e-08 au
tp 2457219.938797442838
(2015-Jul-16.43879744)
6.3837e-05 TDB
node 313.7440402778768 8.047e-05 deg
peri 159.7151587406161 8.1958e-05 deg
i 3.136811193736644 4.7119e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      680  
   data-arc span      6764 days (18.52 yr)  
   first obs. used      2001-10-14  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58152  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 11:32:15  

Additional Information
 Jupiter MOID = 1.98247 au 
 T_jup = 3.362 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.322433003802678E-15 -3.499082241136331E-15 7.316148747508307E-13 2.496005370552767E-16 1.556083735637196E-13 -1.224817696825375E-16
q -3.499082241136331E-15 9.358396402457009E-15 -2.042284946994182E-12 -3.827509997525294E-15 -4.404317428736589E-13 3.488274281110265E-16
tp 7.316148747508307E-13 -2.042284946994182E-12 4.075150204559103E-9 5.748348514352213E-12 1.01199648739137E-9 -4.244284468104397E-13
node 2.496005370552767E-16 -3.827509997525294E-15 5.748348514352213E-12 6.475381618012688E-9 -6.463861381398183E-9 1.212830610231136E-10
peri 1.556083735637196E-13 -4.404317428736589E-13 1.01199648739137E-9 -6.463861381398183E-9 6.7170457455883E-9 -1.212123261723916E-10
i -1.224817696825375E-16 3.488274281110265E-16 -4.244284468104397E-13 1.212830610231136E-10 -1.212123261723916E-10 2.220223592310915E-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 15.9   n/a MPO453933  

146720 (2001 WC87)          Discovered 2001-Nov-19 by LINEAR at Socorro
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09

[ show close-approach data ]
Alternate Designations
 2001 WC87 = 2003 FH79 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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