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118379 (1999 HC12)
Classification: TransNeptunian Object          SPK-ID: 2118379
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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 is not working, here are some notes that might help.
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2321554390835242 0.00082998  
a 45.53736579768112 0.038477 au
q 34.96561864621341 0.028514 au
i 15.32194013986747 0.0014353 deg
node 57.01813592322625 0.0015491 deg
peri 96.76243536571511 0.14211 deg
M 67.5633033995488 0.14177 deg
tp 2437935.636066867010
19.856 TDB
period 112240.6785097858
n .003207393297864045 4.0652e-06 deg/d
Q 56.10911294914883 0.04741 au
  Orbit Determination Parameters
   # obs. used (total)      15  
   data-arc span      2188 days (5.99 yr)  
   first obs. used      1999-04-18  
   last obs. used      2005-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .25205  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 11:31:32  

Additional Information
 Earth MOID = 34.0117 au 
 Jupiter MOID = 29.7502 au 
 T_jup = 5.665 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.6   n/a MPO87914  

118379 (1999 HC12)          Discovered 1999-Apr-18 by Kitt Peak at Kitt Peak
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Oct-25 03:23 UT
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