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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1786086920342977 1.1857e-07  
a 3.085405412412996 5.0689e-08 au
q 2.534325187306368 3.4146e-07 au
i 17.73140531282105 9.5727e-06 deg
node 70.75273545969326 3.1526e-05 deg
peri 110.5137216810029 4.1531e-05 deg
M 26.79351495581878 2.429e-05 deg
tp 2458453.169055605903
(2018-Nov-30.66905561)
0.00013293 TDB
period 1979.551397766731
5.42
4.8782e-05
1.336e-07
d
yr
n .1818593851142946 4.4816e-09 deg/d
Q 3.636485637519624 5.9743e-08 au
  Orbit Determination Parameters
   # obs. used (total)      125  
   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      .58331  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:42:06  

Additional Information
 Earth MOID = 1.5969 au 
 Jupiter MOID = 1.60784 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 16.1   n/a MPO434638  

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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