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

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2314670833375629 0.00083024  
a 45.45749994948225 0.038311 au
q 34.93558502035819 0.028601 au
i 15.33395786446839 0.0014363 deg
node 57.02681591214113 0.0015473 deg
peri 96.40389858550459 0.14208 deg
M 68.6198730320116 0.14333 deg
tp 2437862.478095210208
(1962-Jul-16.97809521)
19.846 TDB
period 111945.5275316638
306.49
141.52
0.3875
d
yr
n .003215849779243518 4.0654e-06 deg/d
Q 55.97941487860633 0.047179 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .25351  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:57:00  

Additional Information
 Earth MOID = 33.9817 au 
 Jupiter MOID = 29.7214 au 
 T_jup = 5.661 
[ 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 ]
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