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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 2456505.5 (2013-Aug-01.0) TDB
Reference: JPL 46 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000604515347663 6.122e-06  
a -2314.311724635852 23.435 AU
q 1.399036956818885 7.3372e-06 AU
i 129.0266593549997 3.1912e-05 deg
node 300.9743378699729 8.3708e-05 deg
peri 2.435502966380776 0.00033199 deg
M -.003987098605085023 6.055e-05 deg
tp 2456955.886833306343
0.0013655 JED
period n/a
n 8.852609157810546E-6 1.3446e-07 deg/d
Q n/a n/a AU
  Orbit Determination Parameters
   # obs. used (total)      597  
   data-arc span      516 days (1.41 yr)  
   first obs. used      2012-10-04  
   last obs. used      2014-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   fit RMS      .39642  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2014-Mar-14 12:52:28  

Additional Information
 Earth MOID = .383677 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 8.6 mag 0.5 46 2 parameter fit from 161 observations, autocmod 2.5c
comet total magnitude slope K1 7.   n/a 46 autocmod 2.5c
comet nuclear magnitude M2 10.4 mag 0.6 46 from 436 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 46 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 46 autocmod 2.5c

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
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
2014-Oct-19 18:30 00:01 Mars 0.000903808591320195 0.000873506681156686 0.000934208071459073 55.9637531777212 55.9580928073037 2456950.270887061 1.01848163749905 1597.15466006718 705.004395076874 -21.5990298100071 101.745618772633 T 46 CATAB v2.0c-linF95 2014-Mar-14 15:32:01 2014-Mar-14 15:32
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
FirstGov 2014-Apr-19 17:09 UT
(server date/time)  
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