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181855 (1998 WT31)
Classification: TransNeptunian Object          SPK-ID: 2181855
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1791744239295089 0.00018724  
a 45.79545146301999 0.013544 au
q 37.5900778285416 0.0025718 au
i 28.68581491556766 0.00022876 deg
node 41.58778149540267 0.00014448 deg
peri 40.69531389432375 0.025011 deg
M 359.1760083109981 0.017402 deg
tp 2459459.590968570552
(2021-Sep-02.09096857)
5.3636 TDB
period 113196.2250716154
309.91
50.217
0.1375
d
yr
n .003180318069549053 1.4109e-06 deg/d
Q 54.00082509749839 0.015971 au
  Orbit Determination Parameters
   # obs. used (total)      35  
   data-arc span      8090 days (22.15 yr)  
   first obs. used      1998-11-18  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .27985  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:20  

Additional Information
 Earth MOID = 36.6546 au 
 Jupiter MOID = 32.7821 au 
 T_jup = 5.234 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.70   n/a MPCxxxxx  

181855 (1998 WT31)          Discovered 1998-Nov-18 by Buie, M. W. at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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