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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1777197212459593 0.00019354  
a 45.70908840330836 0.014161 au
q 37.58568195386548 0.0028618 au
i 28.7261460809807 0.00030642 deg
node 41.65392049053662 0.0001646 deg
peri 41.3439433486443 0.029746 deg
M 356.7738937890144 0.02168 deg
tp 2459612.029207706820
(2022-Feb-01.52920771)
6.3595 TDB
period 112876.1705161604
309.04
52.455
0.1436
d
yr
n .003189335697284831 1.4821e-06 deg/d
Q 53.83249485275123 0.016678 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 = 36.6521 au 
 Jupiter MOID = 32.7833 au 
 T_jup = 5.229 
[ 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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