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100843 (1998 HH21)
Classification: Main-belt Asteroid          SPK-ID: 2100843
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1550070467937802 4.2685e-08  
a 2.375416364506084 9.4762e-09 au
q 2.007210088938379 1.0069e-07 au
i 1.477232399489142 3.7808e-06 deg
node 59.55624458492242 0.00018814 deg
peri 153.9479509477366 0.00018865 deg
M 1.826897914688237 1.3224e-05 deg
tp 2458993.713906763937
(2020-May-24.21390676)
4.9124e-05 TDB
period 1337.235948074025
3.66
8.0019e-06
2.191e-08
d
yr
n .2692120268816401 1.6109e-09 deg/d
Q 2.743622640073791 1.0945e-08 au
  Orbit Determination Parameters
   # obs. used (total)      467  
   data-arc span      8571 days (23.47 yr)  
   first obs. used      1996-11-08  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57225  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 17:56:07  

Additional Information
 Earth MOID = 1.00099 au 
 Jupiter MOID = 2.22133 au 
 T_jup = 3.525 
[ 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 16.6   n/a MPO422320  

100843 (1998 HH21)          Discovered 1998-Apr-20 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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