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100864 (1998 HW54)
Classification: Main-belt Asteroid          SPK-ID: 2100864
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2350670615407871 5.229e-08  
a 3.035887544104099 1.9731e-08 au
q 2.322250379943272 1.542e-07 au
i 2.64622663783031 4.5079e-06 deg
node 298.7978603083557 0.00013753 deg
peri 225.926107920788 0.00013806 deg
M 136.1051789857025 1.1165e-05 deg
tp 2458470.035528327154
(2018-Dec-17.53552833)
5.8757e-05 TDB
period 1932.0881965105
5.29
1.8836e-05
5.157e-08
d
yr
n .1863268978352995 1.8165e-09 deg/d
Q 3.749524708264926 2.4369e-08 au
  Orbit Determination Parameters
   # obs. used (total)      370  
   data-arc span      7767 days (21.26 yr)  
   first obs. used      1998-03-29  
   last obs. used      2019-07-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56815  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:07  

Additional Information
 Earth MOID = 1.33061 au 
 Jupiter MOID = 1.25089 au 
 T_jup = 3.197 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.80   n/a MPCxxxxx  

100864 (1998 HW54)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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