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JPL Small-Body Database Browser
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212901 (2007 WR18)
Classification: Main-belt Asteroid          SPK-ID: 2212901
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1034259209017298 8.6102e-08  
a 2.421182413679275 1.8484e-08 au
q 2.170769392873423 2.1087e-07 au
i 2.592042467701963 8.6766e-06 deg
node 171.4663813464581 0.00013001 deg
peri 201.6937151904272 0.00013297 deg
M 160.160322181092 2.5673e-05 deg
tp 2458388.301690546129
(2018-Sep-26.80169055)
9.815e-05 TDB
period 1376.067358020164
3.77
1.5758e-05
4.314e-08
d
yr
n .2616151003813905 2.9958e-09 deg/d
Q 2.671595434485127 2.0395e-08 au
  Orbit Determination Parameters
   # obs. used (total)      170  
   data-arc span      7452 days (20.40 yr)  
   first obs. used      1999-09-04  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60443  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 02:51:37  

Additional Information
 Earth MOID = 1.17115 au 
 Jupiter MOID = 2.78402 au 
 T_jup = 3.505 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.4   n/a MPO459952  

212901 (2007 WR18)          Discovered 2007-Nov-18 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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