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129601 (1997 WE9)
Classification: Main-belt Asteroid          SPK-ID: 2129601
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2517121843122288 3.5905e-08  
a 2.356906262416671 6.2925e-09 au
q 1.7636442388846 8.5477e-08 au
i 5.708642514120671 4.0336e-06 deg
node 40.41988460835596 3.9955e-05 deg
peri 84.92484410787468 4.0818e-05 deg
M 28.26765592944055 7.0842e-06 deg
tp 2458896.723459696467
(2020-Feb-17.22345970)
2.5963e-05 TDB
period 1321.636098957973
3.62
5.2928e-06
1.449e-08
d
yr
n .2723896542201271 1.0908e-09 deg/d
Q 2.950168285948743 7.8764e-09 au
  Orbit Determination Parameters
   # obs. used (total)      814  
   data-arc span      8215 days (22.49 yr)  
   first obs. used      1997-10-29  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50605  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 21:45:55  

Additional Information
 Earth MOID = .790003 au 
 Jupiter MOID = 2.1498 au 
 T_jup = 3.504 
[ show covariance matrix ]

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 16.0   n/a MPO453774  

129601 (1997 WE9)          Discovered 1997-Nov-21 by Spacewatch at Kitt Peak
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1997 WE9 = 2001 XZ26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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