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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1552397950678323 4.2524e-08  
a 2.376199273092846 9.3554e-09 au
q 2.007318584897581 1.0015e-07 au
i 1.477049491303431 3.7785e-06 deg
node 59.55316011524911 0.00017856 deg
peri 154.0249586095747 0.00017909 deg
M 55.58407820421083 1.2703e-05 deg
tp 2458993.928395918014
(2020-May-24.42839592)		 4.7402e-05 TDB
period 1337.8971078067
3.66		 7.9012e-06
2.163e-08		 d
yr
n .2690789881369658 1.5891e-09 deg/d
Q 2.745079961288112 1.0808e-08 au
   Orbit Determination Parameters
   # obs. used (total)      492  
   data-arc span      8616 days (23.59 yr)  
   first obs. used      1996-11-08  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56748  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:56  

Additional Information
 Earth MOID = 1.00007 au 
 Jupiter MOID = 2.21882 au 
 T_jup = 3.524 
[ 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 16.73   n/a E2021B55  

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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