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JPL Small-Body Database Browser
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173189 (1998 HE108)
Classification: Main-belt Asteroid          SPK-ID: 2173189
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1204778756273257 8.2376e-08  
a 3.085398386760607 3.0205e-08 au
q 2.713676143659711 2.6163e-07 au
i 7.313001310082374 6.2993e-06 deg
node 120.6990772265177 5.6256e-05 deg
peri 84.6733287376066 6.2643e-05 deg
M 318.0197276296459 2.9121e-05 deg
tp 2458831.338397241205
(2019-Dec-13.83839724)
0.00016144 TDB
period 1979.544636435448
5.42
2.9069e-05
7.959e-08
d
yr
n .1818600062730838 2.6705e-09 deg/d
Q 3.457120629861503 3.3844e-08 au
  Orbit Determination Parameters
   # obs. used (total)      403  
   data-arc span      7687 days (21.05 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6235  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 07:41:55  

Additional Information
 Earth MOID = 1.72277 au 
 Jupiter MOID = 1.56146 au 
 T_jup = 3.203 
[ 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 15.2   n/a MPO433112  

173189 (1998 HE108)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 1998 HE108 = 2003 ES23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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