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P/2018 H2 (PANSTARRS)
Classification: Jupiter-family Comet          SPK-ID: 1003570
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 2458234.5 (2018-Apr-26.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5400463395591653 3.3063e-05  
a 4.407160847391883 0.00032279 au
q 2.027089763909428 7.0324e-06 au
i 7.388853380255816 0.00019006 deg
node 68.45587993828754 0.00036111 deg
peri 120.2296289947889 0.0026552 deg
M 9.858205169299046 0.00044755 deg
tp 2458141.959438495547
(2018-Jan-23.45943850)
0.0071467 TDB
period 3379.378047979079
9.25
0.37127
0.001016
d
yr
n .1065284779888079 1.1704e-05 deg/d
Q 6.787231930874339 0.00049711 au
  Orbit Determination Parameters
   # obs. used (total)      169  
   data-arc span      207 days  
   first obs. used      2017-11-17  
   last obs. used      2018-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      5  
   norm. resid. RMS      .49183  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 00:55:11  

Additional Information
 Earth MOID = 1.03987 au 
 Jupiter MOID = .0736137 au 
 T_jup = 2.717 
[ 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 17.0   0.7 4 2 parameter fit from 140 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a 4 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2018.1   P/2018 H2       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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