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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2350670615562704 5.2359e-08  
a 3.035887546712492 1.9874e-08 au
q 2.322250381891512 1.5433e-07 au
i 2.646227099529521 4.5522e-06 deg
node 298.7978436204875 0.000139 deg
peri 225.9261248478251 0.00013953 deg
M 136.1051784385729 1.1366e-05 deg
tp 2458470.035530322142
(2018-Dec-17.53553032)		 5.9697e-05 TDB
period 1932.088199000536
5.29		 1.8972e-05
5.194e-08		 d
yr
n .1863268975951652 1.8296e-09 deg/d
Q 3.749524711533472 2.4546e-08 au
   Orbit Determination Parameters
   # obs. used (total)      366  
   data-arc span      7767 days (21.26 yr)  
   first obs. used      1998-03-29  
   last obs. used      2019-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56975  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:12:31  

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 15.7   n/a MPO432536  

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

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