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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1031865423572305 9.1087e-08  
a 2.421722056178116 1.9108e-08 au
q 2.171832930650853 2.243e-07 au
i 2.591662184353248 8.875e-06 deg
node 171.4737365638997 0.00013471 deg
peri 201.7860349674422 0.00013791 deg
M 55.44871441165277 2.6529e-05 deg
tp 2458388.481453289475
(2018-Sep-26.98145329)
0.00010166 TDB
period 1376.527438474725
3.77
1.6292e-05
4.461e-08
d
yr
n .2615276600653174 3.0953e-09 deg/d
Q 2.671611181705378 2.108e-08 au
  Orbit Determination Parameters
   # obs. used (total)      168  
   data-arc span      7083 days (19.39 yr)  
   first obs. used      1999-09-04  
   last obs. used      2019-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60667  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 11:05:54  

Additional Information
 Earth MOID = 1.17142 au 
 Jupiter MOID = 2.78416 au 
 T_jup = 3.504 
[ 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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