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100839 (1998 HW18)
Classification: Main-belt Asteroid          SPK-ID: 2100839
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 .1844551026595463 5.926e-08  
a 2.275210990277364 1.2257e-08 au
q 1.855536713493624 1.3947e-07 au
i 5.414418198348772 5.2211e-06 deg
node 207.3378516252292 5.586e-05 deg
peri 310.1701274782882 5.7218e-05 deg
M 188.4682384804305 1.381e-05 deg
tp 2459597.773146173883
(2022-Jan-18.27314617)
5.0575e-05 TDB
period 1253.519060947015
3.43
1.013e-05
2.773e-08
d
yr
n .2871914845299802 2.3208e-09 deg/d
Q 2.694885267061103 1.4518e-08 au
  Orbit Determination Parameters
   # obs. used (total)      401  
   data-arc span      7248 days (19.84 yr)  
   first obs. used      1998-03-22  
   last obs. used      2018-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65617  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Feb-05 23:12:36  

Additional Information
 Earth MOID = .869742 au 
 Jupiter MOID = 2.30923 au 
 T_jup = 3.581 
[ 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 16.7   n/a MPO320188  

100839 (1998 HW18)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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