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100889 (1998 HU117)
Classification: Main-belt Asteroid          SPK-ID: 2100889
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .108748743454179 3.4068e-08  
a 2.263758582626159 8.2768e-09 au
q 2.017577681281951 7.6553e-08 au
i 5.723792977344867 3.4796e-06 deg
node 106.8852775288914 3.8111e-05 deg
peri 107.3336024440655 4.1485e-05 deg
M 233.9572628151824 1.7321e-05 deg
tp 2459636.070959641995
(2022-Feb-25.57095964)
6.0863e-05 TDB
period 1244.066488664024
3.41
6.8228e-06
1.868e-08
d
yr
n .2893736012346062 1.587e-09 deg/d
Q 2.509939483970367 9.1769e-09 au
  Orbit Determination Parameters
   # obs. used (total)      757  
   data-arc span      8347 days (22.85 yr)  
   first obs. used      1998-03-24  
   last obs. used      2021-01-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57483  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:13  

Additional Information
 Earth MOID = 1.01833 au 
 Jupiter MOID = 2.46748 au 
 T_jup = 3.603 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457361.5 (2015-Dec-05.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1084734310763301 3.4131e-08  
q 2.018102175909247 7.6651e-08 au
tp 2457148.509670385610
(2015-May-06.00967039)
5.6382e-05 TDB
node 106.9079902288647 3.8132e-05 deg
peri 107.4669647074749 4.1513e-05 deg
i 5.722380258884858 3.4785e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      757  
   data-arc span      8347 days (22.85 yr)  
   first obs. used      1998-03-24  
   last obs. used      2021-01-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57483  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:13  

Additional Information
 Jupiter MOID = 2.46748 au 
 T_jup = 3.603 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.164912086580066E-15 -2.604148133159403E-15 -1.501497132643007E-13 -4.66814875493048E-15 -3.667871717867082E-14 -2.543113266497128E-15
q -2.604148133159403E-15 5.875331321198223E-15 4.325022189522818E-13 1.068693966943948E-14 1.120333996097916E-13 5.835882925800255E-15
tp -1.501497132643007E-13 4.325022189522818E-13 3.178924337408963E-9 1.535780611287045E-11 9.385407626753282E-10 7.282677534537674E-13
node -4.66814875493048E-15 1.068693966943948E-14 1.535780611287045E-11 1.454027143935753E-9 -1.442084467208397E-9 6.937470112296911E-12
peri -3.667871717867082E-14 1.120333996097916E-13 9.385407626753282E-10 -1.442084467208397E-9 1.723339533442061E-9 -6.669719656266775E-12
i -2.543113266497128E-15 5.835882925800255E-15 7.282677534537674E-13 6.937470112296911E-12 -6.669719656266775E-12 1.210008619342418E-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 15.9   n/a MPO337988  

100889 (1998 HU117)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 HU117 = 2000 YJ118 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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