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C/2013 A1 (Siding Spring)
Classification: Hyperbolic Comet          SPK-ID: 1003228
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]
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 2456691.5 (2014-Feb-03.0) TDB
Reference: JPL 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000742407061376 2.8565e-06  
a -1883.920535902058 7.2463 AU
q 1.398635908924871 2.4023e-06 AU
i 129.0273411347216 1.9519e-05 deg
node 300.9762794485837 4.8456e-05 deg
peri 2.440972538934485 0.00015323 deg
M -.003186058483647941 1.838e-05 deg
tp 2456955.828225190370
0.00018885 JED
period n/a
n 1.205341760742097E-5 6.9543e-08 deg/d
Q n/a n/a AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.077459420088966E-8 2.599E-9
A2 [EST] -1.322808153932676E-8 2.219E-9
A3 [EST] -7.392749794363954E-9 1.286E-9
  Orbit Determination Parameters
   # obs. used (total)      310  
   data-arc span      739 days (2.02 yr)  
   first obs. used      2012-10-04  
   last obs. used      2014-10-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   fit RMS      .29278  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2014-Oct-13 16:08:24  

Additional Information
 Earth MOID = .381857 AU 
 T_jup = -0.919 
[ 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 7.9 mag 0.7 101 from 201 observations, assumed slope, autocmod 2.6
comet total magnitude slope K1 8.   n/a 101 autocmod 2.6

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
FirstGov 2015-Mar-27 05:16 UT
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