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C/2011 R1 (McNaught)
Classification: Hyperbolic Comet          SPK-ID: 1003146
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2456227.5 (2012-Oct-27.0) TDB
Reference: JPL 75 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000743835622363 1.3029e-06  
a -2795.73988794017 4.8973 au
q 2.079570919511098 2.9977e-07 au
i 116.1968045991654 2.5431e-05 deg
node 221.4084704361169 1.3056e-05 deg
peri 308.8611386497511 1.7617e-05 deg
M 4.920018427751657E-5 1.2924e-07 deg
tp 2456220.120825174942
9.1572e-05 JED
period n/a
n 6.667437138153163E-6 1.7519e-08 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      1445  
   data-arc span      1246 days (3.41 yr)  
   first obs. used      2010-10-11  
   last obs. used      2014-03-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   fit RMS      .6626  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 19:44:48  

Additional Information
 Earth MOID = 1.31369 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 8.2 mag 1. 75 from 254 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 9.   n/a 75 autocmod 2.5c
comet nuclear magnitude M2 12.1 mag 1. 75 from 1132 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 75 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 75 autocmod 2.5c
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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