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JPL Small-Body Database Browser
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172125 (2002 HE4)
Classification: Main-belt Asteroid          SPK-ID: 2172125
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1401297091276156 5.6733e-08  
a 2.273956220096828 9.2064e-09 au
q 1.955307396405727 1.2969e-07 au
i 5.842643320554965 4.5322e-06 deg
node 114.7099110919024 5.1141e-05 deg
peri 73.02941607505745 5.3107e-05 deg
M 118.5939251408599 1.5085e-05 deg
tp 2458587.897820250627
(2019-Apr-14.39782025)
5.1812e-05 TDB
period 1252.482237461572
3.43
7.6062e-06
2.082e-08
d
yr
n .2874292259262841 1.7455e-09 deg/d
Q 2.592605043787928 1.0496e-08 au
  Orbit Determination Parameters
   # obs. used (total)      489  
   data-arc span      6284 days (17.20 yr)  
   first obs. used      2002-02-16  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55096  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 07:41:10  

Additional Information
 Earth MOID = .96622 au 
 Jupiter MOID = 2.3781 au 
 T_jup = 3.591 
[ 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 16.5   n/a MPO475458  

172125 (2002 HE4)          Discovered 2002-Apr-16 by LINEAR at Socorro
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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