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C/2015 F2 (Polonia)
Classification: Comet          SPK-ID: 1003380
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.


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Orbital Elements at Epoch 2457156.5 (2015-May-14.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9684416525705365 3.8919e-05  
a 38.35915861669371 0.047525 au
q 1.210551654727519 6.9308e-06 au
i 28.69373588543386 0.00033464 deg
node 262.5516175892516 0.00048127 deg
peri 352.0340492047935 0.00025053 deg
M .06296050562505334 0.00011809 deg
tp 2457141.323635729121
(2015-Apr-28.82363573)
0.00026858 TDB
period 86776.48127626217
237.58
161.27
0.4415
d
yr
n .004148589510721248 7.7098e-06 deg/d
Q 75.50776557865991 0.09355 au
  Orbit Determination Parameters
   # obs. used (total)      308  
   data-arc span      125 days  
   first obs. used      2015-03-23  
   last obs. used      2015-07-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      4  
   norm. resid. RMS      .65936  
   source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 17:34:27  

Additional Information
 Earth MOID = .198986 au 
 Jupiter MOID = 1.95199 au 
 T_jup = 1.323 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 14.9   1. 20 2 parameter fit from 116 observations, autocmod 2.6f
comet total magnitude slope K1 21.   n/a 20 autocmod 2.6f
comet nuclear magnitude M2 18.5   0.6 20 from 166 observations, autocmod 2.6f
comet nuclear magnitude slope K2 5.   n/a 20 autocmod 2.6f
comet nuclear phase coefficient PC 0.03   n/a 20 autocmod 2.6f

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2015.3   C/2015 F2       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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