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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2376569954676604 5.2649e-08  
a 3.030353115192651 1.9283e-08 au
q 2.310168498629901 1.5542e-07 au
i 2.638751440315609 4.5034e-06 deg
node 298.7025356667157 0.00013833 deg
peri 226.0740636988963 0.00013881 deg
M 172.4720716844719 1.096e-05 deg
tp 2458473.387645813865
(2018-Dec-20.88764581)
5.6784e-05 TDB
period 1926.807304286171
5.28
1.8392e-05
5.035e-08
d
yr
n .1868375728071937 1.7834e-09 deg/d
Q 3.750537731755402 2.3866e-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 = 1.31959 au 
 Jupiter MOID = 1.24923 au 
 T_jup = 3.198 
[ 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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