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181796 (1998 HN122)
Classification: Main-belt Asteroid          SPK-ID: 2181796
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2113983484473073 3.4489e-08  
a 2.273254771813085 1.178e-08 au
q 1.792692467451839 7.5686e-08 au
i 8.23692920289805 4.3823e-06 deg
node 101.2016702330896 3.388e-05 deg
peri 141.1138398800141 3.626e-05 deg
M 203.5459215040374 1.4954e-05 deg
tp 2459744.570253769512
(2022-Jun-14.07025377)
5.4174e-05 TDB
period 1251.902751528964
3.43
9.7311e-06
2.664e-08
d
yr
n .2875622723572798 2.2352e-09 deg/d
Q 2.753817076174331 1.427e-08 au
  Orbit Determination Parameters
   # obs. used (total)      375  
   data-arc span      9842 days (26.95 yr)  
   first obs. used      1994-01-04  
   last obs. used      2020-12-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5992  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:04  

Additional Information
 Earth MOID = .786192 au 
 Jupiter MOID = 2.28775 au 
 T_jup = 3.568 
[ 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 16.80   n/a MPCxxxxx  

181796 (1998 HN122)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1998 HN122 = 1994 BU5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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