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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1642210610820662 3.6983e-08  
a 2.352647860376811 9.8272e-09 au
q 1.966293532393279 8.5575e-08 au
i 7.328496935528915 4.1214e-06 deg
node 75.54610023992811 3.2023e-05 deg
peri 189.934605165942 3.4313e-05 deg
M 9.341586991991692 1.202e-05 deg
tp 2458966.297962397718
(2020-Apr-26.79796240)
4.4018e-05 TDB
period 1318.055866457915
3.61
8.2584e-06
2.261e-08
d
yr
n .2731295456902354 1.7113e-09 deg/d
Q 2.739002188360344 1.1441e-08 au
  Orbit Determination Parameters
   # obs. used (total)      694  
   data-arc span      8177 days (22.39 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-09-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55685  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:38  

Additional Information
 Earth MOID = .950997 au 
 Jupiter MOID = 2.33769 au 
 T_jup = 3.527 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457440.5 (2016-Feb-22.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1635765634538686 3.7028e-08  
q 1.967774438761406 8.5533e-08 au
tp 2457647.919678595583
(2016-Sep-16.41967860)
4.5317e-05 TDB
node 75.55839758212909 3.2025e-05 deg
peri 189.7431326861169 3.433e-05 deg
i 7.328142689914884 4.121e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      694  
   data-arc span      8177 days (22.39 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-09-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55685  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:38  

Additional Information
 Jupiter MOID = 2.33769 au 
 T_jup = 3.527 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.371053329752623E-15 -3.153186890554369E-15 -6.441169252825696E-15 1.291471079605151E-14 -2.337290245052196E-14 -1.860144103853992E-15
q -3.153186890554369E-15 7.315881104297612E-15 -6.54684115529206E-14 -2.966152189969597E-14 3.121901122358016E-14 4.439216301764946E-15
tp -6.441169252825696E-15 -6.54684115529206E-14 2.053660157853192E-9 7.750562073988741E-12 5.763334765892284E-10 -2.336036187197878E-13
node 1.291471079605151E-14 -2.966152189969597E-14 7.750562073988741E-12 1.025607255444432E-9 -1.014567120396732E-9 3.886316690902606E-12
peri -2.337290245052196E-14 3.121901122358016E-14 5.763334765892284E-10 -1.014567120396732E-9 1.178517264414112E-9 -3.88720813549855E-12
i -1.860144103853992E-15 4.439216301764946E-15 -2.336036187197878E-13 3.886316690902606E-12 -3.88720813549855E-12 1.698240030076922E-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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