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100894 (1998 HK145)
Classification: Main-belt Asteroid          SPK-ID: 2100894
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | 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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1642210644723126 3.7597e-08  
a 2.35264785955393 1.0018e-08 au
q 1.966293523729476 8.7356e-08 au
i 7.328498319963733 4.3424e-06 deg
node 75.54609155528441 3.306e-05 deg
peri 189.9346125615599 3.5456e-05 deg
M 9.341588712865683 1.2856e-05 deg
tp 2458966.297956115084
(2020-Apr-26.79795612)
4.7063e-05 TDB
period 1318.055865766394
3.61
8.4189e-06
2.305e-08
d
yr
n .2731295458335334 1.7446e-09 deg/d
Q 2.739002195378384 1.1663e-08 au
  Orbit Determination Parameters
   # obs. used (total)      656  
   data-arc span      8137 days (22.28 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5573  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 09:04:26  

Additional Information
 Earth MOID = .950997 au 
 Jupiter MOID = 2.33769 au 
 T_jup = 3.527 
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Orbital Elements at Epoch 2457332.5 (2015-Nov-06.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1637168324768002 3.7655e-08  
q 1.96776654729676 8.7411e-08 au
tp 2457647.776677442257
(2016-Sep-16.27667744)
4.7691e-05 TDB
node 75.57399311758063 3.3063e-05 deg
peri 189.6851663572116 3.5466e-05 deg
i 7.327861845290867 4.3417e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      656  
   data-arc span      8137 days (22.28 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5573  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 09:04:26  

Additional Information
 Jupiter MOID = 2.33769 au 
 T_jup = 3.527 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.417867448440195E-15 -3.276725316632476E-15 -1.061393548149937E-13 7.203333026505011E-15 -3.982356031475903E-14 -9.810859561468995E-16
q -3.276725316632476E-15 7.640686819424874E-15 1.952763149312876E-13 -1.574458038869516E-14 7.553099828680037E-14 2.274453775226804E-15
tp -1.061393548149937E-13 1.952763149312876E-13 2.274423850175579E-9 4.676012300091545E-12 6.284388184545227E-10 3.939094035502202E-13
node 7.203333026505011E-15 -1.574458038869516E-14 4.676012300091545E-12 1.09314394637514E-9 -1.08257839819946E-9 -7.281914702670158E-12
peri -3.982356031475903E-14 7.553099828680037E-14 6.284388184545227E-10 -1.08257839819946E-9 1.25783368519403E-9 7.384438936940732E-12
i -9.810859561468995E-16 2.274453775226804E-15 3.939094035502202E-13 -7.281914702670158E-12 7.384438936940732E-12 1.885077678347794E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO436470  

100894 (1998 HK145)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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