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C/2007 Q3 (Siding Spring)
Classification: Hyperbolic Comet          SPK-ID: 1002472
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2454981.5 (2009-May-30.0) TDB
Reference: JPL 116 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000181823728898 7.5592e-07  
a -12383.59122308377 51.484 AU
q 2.251630733329232 3.2052e-07 AU
i 65.65016796510568 7.496e-06 deg
node 149.4129298743943 1.2499e-05 deg
peri 2.097931971356101 1.7662e-05 deg
M -9.318008186705106E-5 5.8108e-07 deg
tp 2455111.783352462290
(2009-Oct-07.28335246)
7.1857e-05 JED
period n/a
n/a
n/a
n/a
d
yr
n 7.152109621528327E-7 4.4602e-09 deg/d
Q n/a n/a AU
  Orbit Determination Parameters
   # obs. used (total)      1326  
   data-arc span      1470 days (4.02 yr)  
   first obs. used      2007-08-25  
   last obs. used      2011-09-03  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   fit RMS      .83316  
   data source      ORB  
   producer      Otto Matic  
   solution date      2012-Jan-27 19:50:08  

Additional Information
 Earth MOID = 1.26289 AU 
 T_jup = 0.767 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.2 mag 1. 116 from 205 observations, assumed slope, autocmod 2.5b
comet total magnitude slope K1 8.   n/a 116 autocmod 2.5b
comet nuclear magnitude M2 9.9 mag 0.9 116 from 925 observations, autocmod 2.5b
comet nuclear magnitude slope K2 5.   n/a 116 autocmod 2.5b
comet nuclear phase coefficient PC 0.03   n/a 116 autocmod 2.5b
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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