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JPL Small-Body Database Browser
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35581 (1998 HD40)
Classification: Main-belt Asteroid          SPK-ID: 2035581
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1544358259713187 7.0878e-08  
a 2.677259250201979 1.9511e-08 au
q 2.263794506557683 1.9519e-07 au
i 8.965456533930096 6.1499e-06 deg
node 35.0343726788844 3.8198e-05 deg
peri 168.3783556257795 4.4638e-05 deg
M 288.258829408413 2.784e-05 deg
tp 2458919.359988786002
(2020-Mar-10.85998879)
0.00012627 TDB
period 1600.051895116719
4.38
1.7491e-05
4.789e-08
d
yr
n .2249927024859022 2.4595e-09 deg/d
Q 3.090723993846276 2.2524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      715  
   data-arc span      9956 days (27.26 yr)  
   first obs. used      1991-10-13  
   last obs. used      2019-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63061  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 01:47:44  

Additional Information
 Earth MOID = 1.26097 au 
 Jupiter MOID = 1.86882 au 
 T_jup = 3.344 
[ 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 14.6   n/a MPO431900  

35581 (1998 HD40)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20020227/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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