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44158 (1998 HN128)
Classification: Main-belt Asteroid          SPK-ID: 2044158
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09509806436428794 3.0716e-08  
a 2.322638255248509 7.4679e-09 au
q 2.101759852955928 7.0735e-08 au
i 6.356875007111546 3.7606e-06 deg
node 136.9179650121444 2.86e-05 deg
peri 145.8505912411939 3.4942e-05 deg
M 62.06982835987653 1.9098e-05 deg
tp 2458977.580103458608
(2020-May-08.08010346)
6.8711e-05 TDB
period 1292.917426637796
3.54
6.2356e-06
1.707e-08
d
yr
n .2784400554768391 1.3429e-09 deg/d
Q 2.543516657541089 8.1781e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1335  
   data-arc span      8289 days (22.69 yr)  
   first obs. used      1998-02-28  
   last obs. used      2020-11-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49639  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:26:17  

Additional Information
 Earth MOID = 1.0869 au 
 Jupiter MOID = 2.57229 au 
 T_jup = 3.562 
[ 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 15.41   n/a E2021B10  

44158 (1998 HN128)          Discovered 1998-Apr-19 by LINEAR at Socorro
Reference: 20020822/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HN128 = 1999 RU83 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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