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JPL Small-Body Database Browser
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39779 (1997 HE9)
Classification: Main-belt Asteroid          SPK-ID: 2039779
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02301285375767715 4.6382e-08  
a 3.07032557612402 2.7753e-08 au
q 2.999668622652222 1.3941e-07 au
i 3.215798258717597 6.0147e-06 deg
node 5.370627798271907 9.1007e-05 deg
peri 224.9630829804884 0.00016266 deg
M 22.92869672907573 0.00013591 deg
tp 2458475.343923034237
(2018-Dec-22.84392303)
0.00074175 TDB
period 1965.056637978864
5.38
2.6644e-05
7.295e-08
d
yr
n .1832008263997285 2.484e-09 deg/d
Q 3.140982529595818 2.8392e-08 au
  Orbit Determination Parameters
   # obs. used (total)      632  
   data-arc span      8128 days (22.25 yr)  
   first obs. used      1996-01-19  
   last obs. used      2018-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60814  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-May-07 04:01:07  

Additional Information
 Earth MOID = 1.98993 au 
 Jupiter MOID = 1.83229 au 
 T_jup = 3.228 
[ 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 14.9   n/a MPO436049  

39779 (1997 HE9)          Discovered 1997-Apr-30 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 HE9 = 1999 TP138 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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