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C/2010 X1 (Elenin)
Classification: Hyperbolic Comet          SPK-ID: 1003113
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.
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 2455650.5 (2011-Mar-30.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000064048145741 1.8591e-06  
a -7532.31733028152 218.63 AU
q .4824309581374332 2.4495e-06 AU
i 1.839475154920383 4.7959e-05 deg
node 323.2338494998166 0.00094556 deg
peri 343.798953487708 0.00093397 deg
M 359.999751654787 1.0812e-05 deg
tp 2455815.219354417315
0.00037603 JED
period n/a
n 1.507686900885618E-6 6.5641e-08 deg/d
Q n/a n/a AU
  Orbit Determination Parameters
   # obs. used (total)      2209  
   data-arc span      234 days  
   first obs. used      2010-12-10  
   last obs. used      2011-08-01  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   fit RMS      .58415  
   data source      ORB  
   producer      Otto Matic  
   solution date      2011-Sep-14 21:24:26  

Additional Information
 Earth MOID = .030627 AU 
 T_jup = 0.861 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 3.456207263765826E-12 1.200984161232074E-12 -5.192195588897656E-10 -1.188784682159179E-10 -1.54407534555451E-10 -6.279889138301894E-12
q 1.200984161232074E-12 6.000089059503247E-12 -6.668591282280052E-10 -4.086490262574901E-10 -4.543306299187816E-11 -2.516011401592897E-11
tp -5.192195588897656E-10 -6.668591282280052E-10 1.414008650272228E-7 4.700030314080427E-8 2.697170502885165E-8 2.922576770841947E-9
node -1.188784682159179E-10 -4.086490262574901E-10 4.700030314080427E-8 8.940795864805675E-7 -8.607598023180779E-7 4.466869390853531E-8
peri -1.54407534555451E-10 -4.543306299187816E-11 2.697170502885165E-8 -8.607598023180779E-7 8.72298754793263E-7 -4.267381663020393E-8
i -6.279889138301894E-12 -2.516011401592897E-11 2.922576770841947E-9 4.466869390853531E-8 -4.267381663020393E-8 2.30009065073777E-9

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 10.4 mag 0.9 36 from 354 observations, assumed slope, autocmod 2.5a
comet total magnitude slope K1 11.   n/a 36 autocmod 2.5a
comet nuclear magnitude M2 13.7 mag 0.8 36 from 1786 observations, autocmod 2.5a
comet nuclear magnitude slope K2 5.   n/a 36 autocmod 2.5a
comet nuclear phase coefficient PC 0.03   n/a 36 autocmod 2.5a

[ 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
2011-Oct-16 19:51 < 00:01 Earth 0.233856004821245 0.233842689072326 0.233869320625418 23.9095477444347 23.9090712072502 2455851.327461871 0.585339943175404 588.927808558155 87.9052841063037 5.33109113481225 63185.4492369253 T 36 CATAB v2.0c-linF95 2011-Sep-15 11:48:04 2011-Sep-15 13:09
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
FirstGov 2011-Oct-14 18:23 UT
(server date/time)  
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