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100829 (1998 HW8)
Classification: Main-belt Asteroid          SPK-ID: 2100829
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0423608637058034 3.9222e-08  
a 2.314271626170835 9.8584e-09 au
q 2.216237081236405 9.1917e-08 au
i 5.278281030168729 4.7098e-06 deg
node 158.509136861975 3.7977e-05 deg
peri 335.6393965175538 6.1875e-05 deg
M 171.2154146377596 4.99e-05 deg
tp 2458388.910128915400
(2018-Sep-27.41012892)
0.00017715 TDB
period 1285.937682984178
3.52
8.2168e-06
2.25e-08
d
yr
n .2799513574908042 1.7888e-09 deg/d
Q 2.412306171105266 1.0276e-08 au
  Orbit Determination Parameters
   # obs. used (total)      502  
   data-arc span      10251 days (28.07 yr)  
   first obs. used      1992-09-25  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59107  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:04:01  

Additional Information
 Earth MOID = 1.23061 au 
 Jupiter MOID = 2.57877 au 
 T_jup = 3.575 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.77   n/a E2021B55  

100829 (1998 HW8)          Discovered 1998-Apr-17 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 HW8 = 1992 SH5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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