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C/2015 H2 (PANSTARRS)
Classification: Hyperbolic Comet          SPK-ID: 1003387
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

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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 2457808.5 (2017-Feb-24.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.003512106761469 1.8585e-05  
a -1414.285459979799 7.4789 au
q 4.967121526642287 1.8582e-05 au
i 33.70531410514059 3.9175e-05 deg
node 350.6918929538623 4.3192e-05 deg
peri 287.9076321077583 0.00028066 deg
M .003033996755181756 2.4035e-05 deg
tp 2457644.774376562277
(2016-Sep-13.27437656)
0.0021377 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.853098306469915E-5 1.4699e-07 deg/d
Q n/a n/a au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.435861415390717E-7 2.279E-8
A2 [EST] -1.181073823844134E-8 2.094E-8
A3 [EST] 3.510731618612743E-8 3.907E-9
ALN [SET] .0408373333128795 n/a
NK [SET] 2.6 n/a
NM [SET] 2. n/a
NN [SET] 3. n/a
R0 [SET] 5. n/a
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      1982 days (5.43 yr)  
   first obs. used      2014-05-19  
   last obs. used      2019-10-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .50833  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:09  

Additional Information
 Earth MOID = 4.13369 au 
 Jupiter MOID = 1.47838 au 
 Nongrav. accels. using CO driven g(r) 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 11.3   0.6 33 2 parameter fit from 118 observations, autocmod 2.9c
comet total magnitude slope K1 5.   n/a 33 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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