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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1812430848470319 1.1143e-07  
a 3.084850032921706 5.0411e-08 au
q 2.525742296664508 3.1818e-07 au
i 17.6970692992394 7.752e-06 deg
node 70.63565297189967 2.7337e-05 deg
peri 110.4819114182946 3.4589e-05 deg
M 135.7761505426054 2.0991e-05 deg
tp 2458454.101940223022
(2018-Dec-01.60194022)
0.00011043 TDB
period 1979.016936670297
5.42
4.851e-05
1.328e-07
d
yr
n .1819084987750036 4.4589e-09 deg/d
Q 3.643957769178904 5.9547e-08 au
  Orbit Determination Parameters
   # obs. used (total)      147  
   data-arc span      6757 days (18.50 yr)  
   first obs. used      2002-02-08  
   last obs. used      2020-08-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55606  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 08:55:59  

Additional Information
 Earth MOID = 1.58745 au 
 Jupiter MOID = 1.60109 au 
 T_jup = 3.130 
[ 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 16.41   n/a E2021B25  

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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