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C/2011 L1 (McNaught)
Classification: Halley-type Comet*          SPK-ID: 1003130
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2455734.5 (2011-Jun-22.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7967985213593568 7.7254e-05  
a 11.03522339612269 0.004176 au
q 2.242373711221951 5.9837e-05 au
i 65.51267762366047 0.001271 deg
node 252.3638461023042 0.00022839 deg
peri 294.4706598268829 0.0023626 deg
M 4.992746324849691 0.0029328 deg
tp 2455548.802045094742
(2010-Dec-18.30204509)
0.0044958 TDB
period 13389.6776275541
36.66
7.6005
0.02081
d
yr
n .02688638292972564 1.5262e-05 deg/d
Q 19.82807308102343 0.0075035 au
  Orbit Determination Parameters
   # obs. used (total)      140  
   data-arc span      103 days  
   first obs. used      2011-06-02  
   last obs. used      2011-09-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      5  
   norm. resid. RMS      .8396  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:31:51  

Additional Information
 Earth MOID = 1.61025 au 
 Jupiter MOID = .547915 au 
 T_jup = 1.201 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 10.4   0.8 15 2 parameter fit from 66 observations, autocmod 2.9c
comet total magnitude slope K1 12.5   n/a 15 autocmod 2.9c
comet nuclear magnitude M2 14.2   0.6 15 from 61 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 15 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 15 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2011.0   C/2011 L1       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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