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324929 (2007 WE21)
Classification: Main-belt Asteroid          SPK-ID: 2324929
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06960808187534649 4.1044e-08  
a 2.460745063441437 1.8176e-08 au
q 2.289457319591051 1.0171e-07 au
i 5.719751141853492 4.6754e-06 deg
node 286.9367553251921 7.0702e-05 deg
peri 186.3088710165711 9.2559e-05 deg
M 95.82110032390148 6.1712e-05 deg
tp 2458625.218622980244
(2019-May-21.71862298)
0.00023993 TDB
period 1409.932627265111
3.86
1.5622e-05
4.277e-08
d
yr
n .2553313491995026 2.829e-09 deg/d
Q 2.632032807291823 1.9442e-08 au
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      7408 days (20.28 yr)  
   first obs. used      2000-01-08  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 21:02:08  

Additional Information
 Earth MOID = 1.3061 au 
 Jupiter MOID = 2.44109 au 
 T_jup = 3.480 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457191.5 (2015-Jun-18.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06960770301266277 4.1121e-08  
q 2.289815487300301 1.0177e-07 au
tp 2457218.421242150053
(2015-Jul-14.92124215)
0.00023346 TDB
node 287.0074755719517 7.0651e-05 deg
peri 187.1994812988769 9.2423e-05 deg
i 5.721873016415157 4.6765e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      7408 days (20.28 yr)  
   first obs. used      2000-01-08  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 21:02:08  

Additional Information
 Jupiter MOID = 2.44109 au 
 T_jup = 3.480 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.690950648068347E-15 -4.127605530739159E-15 2.125660294030682E-13 2.453208539248647E-15 1.799365757067834E-14 -2.013978669138278E-15
q -4.127605530739159E-15 1.035718738577797E-14 8.154454407150869E-13 5.040355949625765E-15 2.967560358652006E-13 4.726343844306379E-15
tp 2.125660294030682E-13 8.154454407150869E-13 5.450573876664125E-8 4.25699886713822E-10 1.398373914720531E-8 -2.481900747446366E-11
node 2.453208539248647E-15 5.040355949625765E-15 4.25699886713822E-10 4.991514194969631E-9 -4.853953878272268E-9 -1.869929638612255E-11
peri 1.799365757067834E-14 2.967560358652006E-13 1.398373914720531E-8 -4.853953878272268E-9 8.542091731609406E-9 1.207326901126789E-11
i -2.013978669138278E-15 4.726343844306379E-15 -2.481900747446366E-11 -1.869929638612255E-11 1.207326901126789E-11 2.1869470788705E-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 17.2   n/a MPO418668  

324929 (2007 WE21)          Discovered 2007-Nov-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20120406/Numbers.arcLast Updated: 2012-04-09

Alternate Designations
 2007 WE21 = 2000 AW217 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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