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142P/Ge-Wang
Classification: Jupiter-family Comet          SPK-ID: 1000160
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2453316.5 (2004-Nov-07.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5001889321049627 1.1235e-06  
a 4.946186430397046 1.8809e-07 au
q 2.47215872178469 5.5953e-06 au
i 12.32732493352093 0.0001235 deg
node 176.5785550496189 0.00034016 deg
peri 176.3267460354485 0.00082483 deg
M 177.574425479539 0.00028636 deg
tp 2451334.598497912361
(1999-Jun-05.09849791)		 0.0032304 TDB
period 4017.946496657883
11.00		 0.00022919
6.275e-07		 d
yr
n .08959800741484412 5.1108e-09 deg/d
Q 7.420214139009402 2.8217e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -3.196286566469411E-9 5.744E-11
   Orbit Determination Parameters
   # obs. used (total)      81  
   data-arc span      11603 days (31.77 yr)  
   first obs. used      1988-10-11  
   last obs. used      2020-07-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .75827  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-06 07:15:58  

Additional Information
 Earth MOID = 1.4669 au 
 Jupiter MOID = .728514 au 
 T_jup = 2.702 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 15.7   1. 18 2 parameter fit from 30 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a 18 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year (est.)		  New-Style 
Desig		 Roman
 Numeral 		 Year/
 Letter 
 1999.4   142P/1999 R2       
 1988.4   142P/1988 V1   1988 VIII   1988o 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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