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C/2012 S1 (ISON)
Classification: Hyperbolic Comet          SPK-ID: 1003203
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 2456413.5 (2013-May-01.0) TDB
Reference: JPL 56 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000005095690719 1.6092e-08  
a -2446.520761814393 7.7289 au
q .0124667131396643 1.0063e-07 au
i 62.16289397901024 0.00032658 deg
node 295.6865418045648 5.5497e-05 deg
peri 345.5411989420559 4.3516e-05 deg
M -.001724780901920006 8.1729e-06 deg
tp 2456625.264530286448
(2013-Nov-28.76453029)		 7.9908e-05 TDB
period n/a
n/a		 n/a
n/a		 d
yr
n 8.144805457207318E-6 3.8596e-08 deg/d
Q n/a n/a au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 8.538925085916436E-8 2.168E-9
A2 [EST] 5.750838889587425E-9 6.145E-10
   Orbit Determination Parameters
   # obs. used (total)      6682  
   data-arc span      784 days (2.15 yr)  
   first obs. used      2011-09-30  
   last obs. used      2013-11-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .57173  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:32:22  

Additional Information
 Earth MOID = .0229939 au 
 Jupiter MOID = .68569 au 
 T_jup = 0.065 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 10.2   1. 56 2 parameter fit from 1313 observations, autocmod 2.9c
comet total magnitude slope K1 4.75   n/a 56 autocmod 2.9c

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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