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C/2009 R1 (McNaught)
Classification: Hyperbolic Comet          SPK-ID: 1003036
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2455299.5 (2010-Apr-13.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000406751994624 2.11e-06  
a -995.8983735013639 5.163 au
q .4050836498645098 1.3504e-06 au
i 77.03083803769042 7.5951e-05 deg
node 322.622710199475 2.1177e-05 deg
peri 130.6936771145205 0.00020966 deg
M -.002530103067458741 1.9674e-05 deg
tp 2455380.178288002300
(2010-Jul-02.67828800)
2.9972e-05 TDB
period n/a
n/a
n/a
n/a
d
yr
n 3.136039608806042E-5 2.4387e-07 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      765  
   data-arc span      344 days  
   first obs. used      2009-07-20  
   last obs. used      2010-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   norm. resid. RMS      .79029  
   source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 19:44:24  

Additional Information
 Earth MOID = .446111 au 
[ 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 9.8   2. 28 2 parameter fit from 162 observations, autocmod 2.5c
comet total magnitude slope K1 7.   n/a 28 autocmod 2.5c

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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
2009-Aug-25 07:28 < 00:01 Jupiter 1.25662540014133 1.25661830348783 1.2566324971827 22.0289505039325 21.9983310637815 2455068.810951913 0.883766183507548 1624.97817376037 254.638377320683 81.1312204530046 714709.04326072 T 28 CATAB v2.0e-lin.ifort 2017-Nov-30 19:07:32 2017-Nov-30 19:07
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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