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129769 (1999 HN)
Classification: Main-belt Asteroid          SPK-ID: 2129769
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1098521099052992 3.8254e-08  
a 2.34649365399362 1.5386e-08 au
q 2.088726375223026 9.1888e-08 au
i 2.820874555254841 4.3921e-06 deg
node 241.2954378661452 9.351e-05 deg
peri 315.5458353349434 9.6069e-05 deg
M 322.8648189288548 2.1074e-05 deg
tp 2459135.928649599692
(2020-Oct-13.42864960)
7.6847e-05 TDB
period 1312.887468152733
3.59
1.2913e-05
3.535e-08
d
yr
n .2742047652465823 2.6969e-09 deg/d
Q 2.604260932764214 1.7076e-08 au
  Orbit Determination Parameters
   # obs. used (total)      442  
   data-arc span      7673 days (21.01 yr)  
   first obs. used      1999-04-17  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58593  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 21:46:54  

Additional Information
 Earth MOID = 1.08784 au 
 Jupiter MOID = 2.35993 au 
 T_jup = 3.551 
[ 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 16.4   n/a MPO412840  

129769 (1999 HN)          Discovered 1999-Apr-17 by Pravec, P. at Ondrejov
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1999 HN = 2001 XE189 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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