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C/2010 X1 (Elenin)
Classification: Hyperbolic Comet          SPK-ID: 1003113
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2455651.5 (2011-Mar-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000068095226441 1.8496e-06  
a -7084.513117079299 192.42 au
q .4824215249311249 2.6549e-06 au
i 1.83957593943795 4.5064e-05 deg
node 323.235099758002 0.00089743 deg
peri 343.798053273921 0.00089506 deg
M -.0002706073326346699 1.1025e-05 deg
tp 2455815.219533945734
(2011-Sep-10.71953395)		 0.00036038 TDB
period n/a
n/a		 n/a
n/a		 d
yr
n 1.652871383840884E-6 6.7341e-08 deg/d
Q n/a n/a au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -4.490851666247193E-8 1.175E-8
A2 [EST] 6.163129316527091E-8 7.965E-9
   Orbit Determination Parameters
   # obs. used (total)      2235  
   data-arc span      271 days  
   first obs. used      2010-12-10  
   last obs. used      2011-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .59542  
   source      ORB  
   producer      Shantanu Naidu  
   solution date      2018-Aug-29 15:52:04  

Additional Information
 Earth MOID = .0306308 au 
 Jupiter MOID = .148357 au 
 T_jup = 0.861 
[ 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 10.4   0.9 38 from 354 observations, assumed slope, autocmod 2.6n
comet total magnitude slope K1 11.   n/a 38 autocmod 2.6n
comet nuclear magnitude M2 13.7   0.8 38 from 1786 observations, autocmod 2.6n
comet nuclear magnitude slope K2 5.   n/a 38 autocmod 2.6n
comet nuclear phase coefficient PC 0.03   n/a 38 autocmod 2.6n

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