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118378 (1999 HT11)
Classification: TransNeptunian Object          SPK-ID: 2118378
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1190475815304301 0.00019903  
a 44.00867393813633 0.020724 au
q 38.76954773943992 0.010213 au
i 5.045387018623634 0.00016555 deg
node 87.97803384184536 0.0024669 deg
peri 188.1162324237118 0.13828 deg
M 328.058071403992 0.12506 deg
tp 2468462.097839252445
(2046-Apr-26.59783925)
30.423 TDB
period 106636.4922798235
291.95
75.325
0.2062
d
yr
n .003375955006615639 2.3847e-06 deg/d
Q 49.24780013683273 0.023191 au
  Orbit Determination Parameters
   # obs. used (total)      28  
   data-arc span      5881 days (16.10 yr)  
   first obs. used      1999-04-17  
   last obs. used      2015-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .29499  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 11:31:33  

Additional Information
 Earth MOID = 37.7532 au 
 Jupiter MOID = 33.5304 au 
 T_jup = 5.871 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453693.5 (2005-Nov-19.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1162617755594249 0.00020915  
q 38.92496708601914 0.0098396 au
tp 2467943.502758517341
(2044-Nov-24.00275852)
30.816 TDB
node 87.95833816299074 0.0024597 deg
peri 185.7718603448531 0.1383 deg
i 5.049864603446041 0.00016535 deg
  Orbit Determination Parameters
   # obs. used (total)      28  
   data-arc span      5881 days (16.10 yr)  
   first obs. used      1999-04-17  
   last obs. used      2015-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .29499  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 11:31:33  

Additional Information
 Jupiter MOID = 33.5304 au 
 T_jup = 5.871 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.374205561469578E-8 1.773735479877345E-6 -.005833254623325288 -1.110952492315271E-9 -2.593475806994471E-5 2.143953688851862E-9
q 1.773735479877345E-6 9.681701493026698E-5 -.3018905780334538 1.721553423478762E-7 -.001356887172899691 8.559071354029276E-8
tp -.005833254623325288 -.3018905780334538 949.621412267105 -.0004224420148839116 4.260481133918755 -.0002822643515585129
node -1.110952492315271E-9 1.721553423478762E-7 -.0004224420148839116 6.050100327133325E-6 -8.030747282477324E-6 -3.825501163244141E-7
peri -2.593475806994471E-5 -.001356887172899691 4.260481133918755 -8.030747282477324E-6 .0191278180752343 -8.732234562549381E-7
i 2.143953688851862E-9 8.559071354029276E-8 -.0002822643515585129 -3.825501163244141E-7 -8.732234562549381E-7 2.73408532689226E-8

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.6   n/a MPO341358  

118378 (1999 HT11)          Discovered 1999-Apr-17 by Kitt Peak at Kitt Peak
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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