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JPL Small-Body Database Browser
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39986 (1998 HJ32)
Classification: Main-belt Asteroid          SPK-ID: 2039986
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1965054450498583 5.5866e-08  
a 2.532028987103489 1.8e-08 au
q 2.034471504113576 1.4278e-07 au
i 13.00890814953455 6.2489e-06 deg
node 203.7222307135826 2.5344e-05 deg
peri 159.2079805983282 3.1186e-05 deg
M 283.9629079981665 2.2337e-05 deg
tp 2458911.331078370931
(2020-Mar-02.83107837)
9.2023e-05 TDB
period 1471.639502084549
4.03
1.5692e-05
4.296e-08
d
yr
n .2446251269350047 2.6085e-09 deg/d
Q 3.029586470093403 2.1537e-08 au
  Orbit Determination Parameters
   # obs. used (total)      783  
   data-arc span      7922 days (21.69 yr)  
   first obs. used      1998-03-22  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53057  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 03:12:26  

Additional Information
 Earth MOID = 1.03766 au 
 Jupiter MOID = 2.45499 au 
 T_jup = 3.388 
[ 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 14.1   n/a MPO449244  
diameter diameter 3.635 km 0.819 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.443   0.287 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39986 (1998 HJ32)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 HJ32 = 1999 NZ51 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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