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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1666809830006816 4.2547e-08  
a 2.895901884547998 1.7939e-08 au
q 2.413210111758012 1.2258e-07 au
i 2.415923495973006 4.7754e-06 deg
node 141.9306828701903 0.00011684 deg
peri 54.30520936585831 0.00011775 deg
M 182.1052008625832 1.6368e-05 deg
tp 2459889.977450956168
(2022-Nov-06.47745096)
8.6066e-05 TDB
period 1800.006992317235
4.93
1.6726e-05
4.579e-08
d
yr
n .1999992230788808 1.8584e-09 deg/d
Q 3.378593657337985 2.0929e-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 = 1.41289 au 
 Jupiter MOID = 1.57708 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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