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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02310832583253308 4.7043e-08  
a 3.065811346142043 2.8196e-08 au
q 2.994965578614316 1.4127e-07 au
i 3.216942912153986 6.0194e-06 deg
node 5.203798922795478 9.1001e-05 deg
peri 220.4970404006887 0.00016117 deg
M 100.8136875668568 0.00013423 deg
tp 2458451.422601311814
(2018-Nov-28.92260131)
0.00073028 TDB
period 1960.724464092827
5.37
2.7049e-05
7.406e-08
d
yr
n .1836056042512643 2.5329e-09 deg/d
Q 3.13665711366977 2.8848e-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 = 1.98607 au 
 Jupiter MOID = 1.83264 au 
 T_jup = 3.230 
[ 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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