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441434 (2008 HE4)
Classification: Main-belt Asteroid          SPK-ID: 2441434
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1801902926141303 1.1822e-07  
a 3.088003798728887 5.0785e-08 au
q 2.531575490642383 3.4193e-07 au
i 17.70848755362806 9.5279e-06 deg
node 70.71225196703433 3.0991e-05 deg
peri 110.6355952268041 4.0869e-05 deg
M 99.24558500472443 2.4042e-05 deg
tp 2458454.083429724906
(2018-Dec-01.58342972)
0.00013009 TDB
period 1982.052554677064
5.43
4.8895e-05
1.339e-07
d
yr
n .1816298963165762 4.4806e-09 deg/d
Q 3.644432106815391 5.9936e-08 au
  Orbit Determination Parameters
   # obs. used (total)      133  
   data-arc span      6354 days (17.40 yr)  
   first obs. used      2002-02-08  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56052  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:35:57  

Additional Information
 Earth MOID = 1.59361 au 
 Jupiter MOID = 1.60046 au 
 T_jup = 3.129 
[ 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 16.3   n/a MPO477081  

441434 (2008 HE4)          Discovered 2008-Mar-30 by CSS at Catalina
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2008 HE4 = 2013 CX180 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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