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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


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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
(1962-Sep-28.13606687)
19.856 TDB
period 112240.6785097858
307.30
142.26
0.3895
d
yr
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 
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Orbital Elements at Epoch 2451917.5 (2001-Jan-08.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2332710350109081 0.00083248  
q 34.55808534829164 0.028769 au
tp 2437545.873018193592
(1961-Sep-03.37301819)
19.011 TDB
node 56.98092391034725 0.001544 deg
peri 94.16908488018817 0.13792 deg
i 15.38763846782978 0.0014412 deg
  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
 Jupiter MOID = 29.7502 au 
 T_jup = 5.665 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.930157769940768E-7 -1.545515834729136E-5 .002912401676613564 1.333507778271776E-7 -2.966536628779529E-5 -1.204946566487277E-7
q -1.545515834729136E-5 .0008276596378732272 .3453019132079366 -2.888744265670697E-7 .003588429849019005 1.618692276028821E-6
tp .002912401676613564 .3453019132079366 361.4304138520149 .00282962829363667 2.364390986155411 -.001407574505997351
node 1.333507778271776E-7 -2.888744265670697E-7 .00282962829363667 2.383806918232481E-6 8.256300117597483E-6 -2.16611887570935E-6
peri -2.966536628779529E-5 .003588429849019005 2.364390986155411 8.256300117597483E-6 .01902073629733219 7.696642058962542E-7
i -1.204946566487277E-7 1.618692276028821E-6 -.001407574505997351 -2.16611887570935E-6 7.696642058962542E-7 2.077195214148057E-6

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 ]
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