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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1642210677007995 4.3724e-08  
a 2.352647858532209 1.2335e-08 au
q 1.96629351528005 1.0515e-07 au
i 7.328500778969572 4.8394e-06 deg
node 75.54606634297218 3.8901e-05 deg
peri 189.9346359428601 4.2966e-05 deg
M 9.341590991484598 2.1476e-05 deg
tp 2458966.297947794734
(2020-Apr-26.79794779)
7.85e-05 TDB
period 1318.055864907775
3.61
1.0366e-05
2.838e-08
d
yr
n .2731295460114578 2.1481e-09 deg/d
Q 2.739002201784368 1.4361e-08 au
  Orbit Determination Parameters
   # obs. used (total)      552  
   data-arc span      7651 days (20.95 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59196  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:13:09  

Additional Information
 Earth MOID = .950997 au 
 Jupiter MOID = 2.33769 au 
 T_jup = 3.527 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457085.5 (2015-Mar-04.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1642831324325367 4.3797e-08  
q 1.96578996836048 1.0538e-07 au
tp 2457647.551187829610
(2016-Sep-16.05118783)
7.378e-05 TDB
node 75.6127387852728 3.8879e-05 deg
peri 189.6894956295614 4.2912e-05 deg
i 7.330889290775032 4.8403e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      552  
   data-arc span      7651 days (20.95 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59196  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:13:09  

Additional Information
 Jupiter MOID = 2.33769 au 
 T_jup = 3.527 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.91821034856203E-15 -4.593754954791918E-15 -1.361610689141262E-12 -4.015040550535729E-17 -3.160077585869643E-13 -7.029632542233782E-16
q -4.593754954791918E-15 1.110575289862104E-14 3.49694264954227E-12 2.662817914038177E-16 8.053492724730994E-13 2.014712235119329E-15
tp -1.361610689141262E-12 3.49694264954227E-12 5.44344474506243E-9 -1.653734555122847E-11 1.365325102362362E-9 4.139510525959978E-12
node -4.015040550535729E-17 2.662817914038177E-16 -1.653734555122847E-11 1.51156478100465E-9 -1.502804303006024E-9 -5.020558722598769E-11
peri -3.160077585869643E-13 8.053492724730994E-13 1.365325102362362E-9 -1.502804303006024E-9 1.841481248611375E-9 5.084288413048886E-11
i -7.029632542233782E-16 2.014712235119329E-15 4.139510525959978E-12 -5.020558722598769E-11 5.084288413048886E-11 2.34283791462228E-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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