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JPL Small-Body Database Browser
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39997 (1998 HE76)
Classification: Main-belt Asteroid          SPK-ID: 2039997
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1668488333769494 4.2586e-08  
a 2.895976750092824 1.8076e-08 au
q 2.412786407853067 1.228e-07 au
i 2.415919394837814 4.7754e-06 deg
node 141.9321024603768 0.00011685 deg
peri 54.3823072056696 0.00011775 deg
M 101.9928363703167 1.6e-05 deg
tp 2458090.514061353253
(2017-Dec-03.01406135)
7.8066e-05 TDB
period 1800.076794082191
4.93
1.6853e-05
4.614e-08
d
yr
n .1999914676882183 1.8724e-09 deg/d
Q 3.379167092332581 2.1092e-08 au
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      14666 days (40.15 yr)  
   first obs. used      1979-07-24  
   last obs. used      2019-09-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60782  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:00:39  

Additional Information
 Earth MOID = 1.41279 au 
 Jupiter MOID = 1.57769 au 
 T_jup = 3.267 
[ 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 15.2   n/a MPO493128  

39997 (1998 HE76)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HE76 = 1979 OX3 = 2001 XN172 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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