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JPL Small-Body Database Browser
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39987 (1998 HJ33)
Classification: Main-belt Asteroid          SPK-ID: 2039987
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1373880377811746 2.906e-08  
a 2.455443452748239 1.0416e-08 au
q 2.118094894892526 7.3101e-08 au
i 1.783884802287338 4.5704e-06 deg
node 328.4464000440601 0.00010881 deg
peri 253.0824130218336 0.00011028 deg
M 254.4535070194763 1.8662e-05 deg
tp 2459412.535503556095
(2021-Jul-17.03550356)
7.3749e-05 TDB
period 1405.378588065127
3.85
8.9422e-06
2.448e-08
d
yr
n .2561587340644165 1.6299e-09 deg/d
Q 2.792792010603952 1.1847e-08 au
  Orbit Determination Parameters
   # obs. used (total)      884  
   data-arc span      17789 days (48.70 yr)  
   first obs. used      1971-03-24  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56423  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 03:12:26  

Additional Information
 Earth MOID = 1.11058 au 
 Jupiter MOID = 2.18809 au 
 T_jup = 3.479 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO449244  

39987 (1998 HJ33)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HJ33 = 1082 T-1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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