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118270 (1998 HN129)
Classification: Main-belt Asteroid          SPK-ID: 2118270
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1620890559655938 5.6338e-08  
a 2.795092597928202 2.0103e-08 au
q 2.3420386773936 1.5613e-07 au
i 7.682181576298717 7.2962e-06 deg
node 205.6305344057474 3.3399e-05 deg
peri 327.9220370387378 3.8323e-05 deg
M 277.2728668155509 2.0226e-05 deg
tp 2459392.727645434063
(2021-Jun-27.22764543)
9.8332e-05 TDB
period 1706.839665789425
4.67
1.8414e-05
5.041e-08
d
yr
n .2109161201345162 2.2755e-09 deg/d
Q 3.248146518462804 2.3362e-08 au
  Orbit Determination Parameters
   # obs. used (total)      440  
   data-arc span      8251 days (22.59 yr)  
   first obs. used      1998-03-22  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55582  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:12:41  

Additional Information
 Earth MOID = 1.35055 au 
 Jupiter MOID = 1.74345 au 
 T_jup = 3.295 
[ 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 15.4   n/a MPO493675  

118270 (1998 HN129)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1998 HN129 = 2003 JL6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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