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212900 (2007 WH18)
Classification: Main-belt Asteroid          SPK-ID: 2212900
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .003890179647173094 6.7808e-08  
a 2.899226968045224 3.5605e-08 au
q 2.887948454301599 2.0597e-07 au
i 2.946533220808727 7.4612e-06 deg
node 134.7346632063293 0.00012862 deg
peri 187.3833423133624 0.00088362 deg
M 298.45821788376 0.00087458 deg
tp 2459308.740228555410
(2021-Apr-04.24022856)
0.0043801 TDB
period 1803.108042441056
4.94
3.3216e-05
9.094e-08
d
yr
n .1996552572149977 3.678e-09 deg/d
Q 2.910505481788848 3.5744e-08 au
  Orbit Determination Parameters
   # obs. used (total)      200  
   data-arc span      7791 days (21.33 yr)  
   first obs. used      1997-12-05  
   last obs. used      2019-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66308  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 11:10:25  

Additional Information
 Earth MOID = 1.87332 au 
 Jupiter MOID = 2.06413 au 
 T_jup = 3.286 
[ 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 16.3   n/a MPO433391  

212900 (2007 WH18)          Discovered 2007-Nov-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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