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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1781653171902442 0.0001943  
a 45.73747767611089 0.014191 au
q 37.58864545846488 0.0028376 au
i 28.70177780353416 0.00030616 deg
node 41.61481024335509 0.00016444 deg
peri 40.88982473371114 0.029256 deg
M 358.3870192747864 0.020633 deg
tp 2459506.713146330231
(2021-Oct-19.21314633)
6.2568 TDB
period 112981.3455487858
309.33
52.582
0.144
d
yr
n .003186366724978954 1.4829e-06 deg/d
Q 53.8863098937569 0.016719 au
  Orbit Determination Parameters
   # obs. used (total)      32  
   data-arc span      6972 days (19.09 yr)  
   first obs. used      1998-11-18  
   last obs. used      2017-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .29698  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:51:23  

Additional Information
 Earth MOID = 36.6541 au 
 Jupiter MOID = 32.7815 au 
 T_jup = 5.232 
[ 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 7.3   n/a MPO433186  

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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