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JPL Small-Body Database Browser
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C/2011 L2 (McNaught)
Classification: Hyperbolic Comet          SPK-ID: 1003131
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2455812.5 (2011-Sep-08.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.00177359011139 2.3839e-05  
a -1095.770632168213 14.72 au
q 1.943447957565112 1.507e-05 au
i 104.2574465134969 8.4234e-05 deg
node 131.3477474941526 7.0397e-05 deg
peri 257.0281816531582 0.00091699 deg
M -.001474720676782294 2.9665e-05 deg
tp 2455866.773168988380
(2011-Nov-01.27316899)
0.0019464 TDB
period n/a
n/a
n/a
n/a
d
yr
n 2.717218663052519E-5 5.4752e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      58  
   data-arc span      240 days  
   first obs. used      2011-06-02  
   last obs. used      2012-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   norm. resid. RMS      .65288  
   source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 19:44:44  

Additional Information
 Earth MOID = 1.49674 au 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 11.8   01. 14 2 parameter fit from 19 observations, autocmod 2.5c
comet total magnitude slope K1 13.   n/a 14 autocmod 2.5c
comet nuclear magnitude M2 17.3   0.7 14 from 34 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 14 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 14 autocmod 2.5c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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