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JPL Small-Body Database Browser
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390187 (2012 WH18)
Classification: Main-belt Asteroid          SPK-ID: 2390187
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1639416563801881 1.0748e-07  
a 3.116854059691925 6.5733e-08 au
q 2.605871842450717 3.6292e-07 au
i 8.626210215753691 9.109e-06 deg
node 45.16730350176481 5.9922e-05 deg
peri 102.6380701292127 6.5727e-05 deg
M 352.2707718720081 2.6255e-05 deg
tp 2458643.652578720730
(2019-Jun-09.15257872)
0.00014703 TDB
period 2009.893883608127
5.50
6.3582e-05
1.741e-07
d
yr
n .1791139337932281 5.6662e-09 deg/d
Q 3.627836276933133 7.6509e-08 au
  Orbit Determination Parameters
   # obs. used (total)      115  
   data-arc span      4458 days (12.21 yr)  
   first obs. used      2006-11-16  
   last obs. used      2019-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66201  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:58:50  

Additional Information
 Earth MOID = 1.63461 au 
 Jupiter MOID = 1.4611 au 
 T_jup = 3.179 
[ 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 MPO427945  

390187 (2012 WH18)          Discovered 2007-Nov-17 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2014-03-21

[ show close-approach data ]
Alternate Designations
 2012 WH18 = 2009 HW24 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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