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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1619168438351333 4.6713e-08  
a 2.795177485888586 1.5084e-08 au
q 2.342591169414483 1.3591e-07 au
i 7.682182559659533 4.5492e-06 deg
node 205.6158204410353 3.2849e-05 deg
peri 327.8597836267476 3.5885e-05 deg
M .841380609082981 1.3126e-05 deg
tp 2459392.510646609744
(2021-Jun-27.01064661)
6.2233e-05 TDB
period 1706.917422375088
4.67
1.3817e-05
3.783e-08
d
yr
n .21090651210243 1.7072e-09 deg/d
Q 3.247763802362688 1.7527e-08 au
  Orbit Determination Parameters
   # obs. used (total)      636  
   data-arc span      8448 days (23.13 yr)  
   first obs. used      1998-03-22  
   last obs. used      2021-05-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50957  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 00:41:55  

Additional Information
 Earth MOID = 1.35194 au 
 Jupiter MOID = 1.74208 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 15.51   n/a MPCxxxxx  

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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