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P/2008 QP20 (LINEAR-Hill)
Classification: Jupiter-family Comet          SPK-ID: 1002994
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.


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Orbital Elements at Epoch 2454792.5 (2008-Nov-22.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5063332254168077 2.9021e-07  
a 3.490496566684602 1.6924e-06 au
q 1.723142181768894 8.7125e-07 au
i 7.749757377510456 9.5556e-06 deg
node 325.1515580844859 0.00017583 deg
peri 72.0419920425466 0.0006975 deg
M 2.916499902861182 0.00016027 deg
tp 2454773.203048063030
(2008-Nov-02.70304806)
0.0010469 TDB
period 2381.931400201338
6.52
0.0017324
4.743e-06
d
yr
n .1511378539153438 1.0992e-07 deg/d
Q 5.25785095160031 2.5493e-06 au
  Orbit Determination Parameters
   # obs. used (total)      486  
   data-arc span      2745 days (7.52 yr)  
   first obs. used      2008-08-25  
   last obs. used      2016-03-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .6764  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-06 07:15:36  

Additional Information
 Earth MOID = .748683 au 
 Jupiter MOID = .800098 au 
 T_jup = 2.890 
[ 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 16.1   0.8 29 2 parameter fit from 115 observations, autocmod 2.8
comet total magnitude slope K1 8.5   n/a 29 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2008.8   P/2008 QP20       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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