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JPL Small-Body Database Browser
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39993 (1998 HQ41)
Classification: Main-belt Asteroid          SPK-ID: 2039993
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1426450136596694 1.1454e-07  
a 2.54654956798877 2.0059e-08 au
q 2.183296970077987 2.9181e-07 au
i 3.533435304447765 6.4636e-06 deg
node 52.06399001221099 8.6308e-05 deg
peri 313.4384914388193 8.9233e-05 deg
M 350.984677177119 2.7232e-05 deg
tp 2459037.671099700652
(2020-Jul-07.17109970)
0.00011233 TDB
period 1484.316885278027
4.06
1.7538e-05
4.802e-08
d
yr
n .2425358113018896 2.8657e-09 deg/d
Q 2.909802165899553 2.292e-08 au
  Orbit Determination Parameters
   # obs. used (total)      507  
   data-arc span      7380 days (20.21 yr)  
   first obs. used      1998-03-29  
   last obs. used      2018-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55161  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:09:26  

Additional Information
 Earth MOID = 1.18353 au 
 Jupiter MOID = 2.55009 au 
 T_jup = 3.426 
[ 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 15.5   n/a MPO395379  

39993 (1998 HQ41)          Discovered 1998-Apr-24 by Spacewatch at Kitt Peak
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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