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JPL Small-Body Database Browser
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226675 (2004 HE18)
Classification: Main-belt Asteroid          SPK-ID: 2226675
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03203343494281172 5.7744e-08  
a 2.325422727595889 1.4043e-08 au
q 2.25093144993691 1.3732e-07 au
i 5.321578495244485 7.5498e-06 deg
node 212.7943872341026 4.9654e-05 deg
peri 311.4597693809554 0.00011051 deg
M 140.8321757081652 9.8407e-05 deg
tp 2458093.800257084293
(2017-Dec-06.30025708)
0.00035368 TDB
period 1295.243125602571
3.55
1.1733e-05
3.212e-08
d
yr
n .2779400970242721 2.5177e-09 deg/d
Q 2.399914005254867 1.4493e-08 au
  Orbit Determination Parameters
   # obs. used (total)      358  
   data-arc span      6166 days (16.88 yr)  
   first obs. used      2002-11-14  
   last obs. used      2019-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60235  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 00:55:41  

Additional Information
 Earth MOID = 1.2598 au 
 Jupiter MOID = 2.57212 au 
 T_jup = 3.568 
[ 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 16.5   n/a MPO450051  

226675 (2004 HE18)          Discovered 2004-Apr-17 by LINEAR at Socorro
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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