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

[ show orbit diagram ]
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2013-Oct-01 17:26 < 00:01 Mars 0.0724793752711243 0.0724785334292963 0.0724802171129688 40.0719390668662 40.0718404952387 2456567.226444129 0.23842722649454 42.1149628699508 36.5031876909588 9.25549554407961 258447.901621338 T 56 CATAB v2.0g-lin.ifort 2021-Apr-15 23:32:34 2021-Apr-15 23:32
2013-Dec-26 20:19 00:43 Earth 0.430617119504371 0.430271898871042 0.430962436153312 47.5151553956755 47.5150251721327 2456653.346265835 43.486711971979 20012.7365730021 1900.02413411864 30.8034075566431 16820.0709280784 T 56 CATAB v2.0g-lin.ifort 2021-Apr-15 23:32:34 2021-Apr-15 23:32
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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