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441435 (2008 HE8)
Classification: Outer Main-belt Asteroid          SPK-ID: 2441435
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07156541745416414 1.2198e-07  
a 3.207195944561809 1.4677e-07 au
q 2.977671627931941 3.4808e-07 au
i 9.984926234383005 1.2992e-05 deg
node 124.3280453676754 6.5288e-05 deg
peri 64.35316774458802 0.00013451 deg
M 61.50041785010219 0.00014233 deg
tp 2458642.104759381089
(2019-Jun-07.60475938)
0.00081114 TDB
period 2097.909105874368
5.74
0.00014401
3.943e-07
d
yr
n .171599426777815 1.1779e-08 deg/d
Q 3.436720261191678 1.5727e-07 au
  Orbit Determination Parameters
   # obs. used (total)      46  
   data-arc span      2712 days (7.43 yr)  
   first obs. used      2008-04-03  
   last obs. used      2015-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66059  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:38:26  

Additional Information
 Earth MOID = 1.99735 au 
 Jupiter MOID = 1.60549 au 
 T_jup = 3.165 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456545.5 (2013-Sep-10.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07066476372790885 1.2113e-07  
q 2.978229850174846 3.462e-07 au
tp 2456534.859243474047
(2013-Aug-30.35924347)
0.00072419 TDB
node 124.3684994051353 6.5332e-05 deg
peri 62.50573771663412 0.00013738 deg
i 9.982990118981208 1.299e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      46  
   data-arc span      2712 days (7.43 yr)  
   first obs. used      2008-04-03  
   last obs. used      2015-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66059  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:38:26  

Additional Information
 Jupiter MOID = 1.60549 au 
 T_jup = 3.165 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.46734116946348E-14 -3.907510155640205E-14 3.30149122096738E-11 -3.616520042292001E-14 5.029065736028455E-12 2.212740600064625E-14
q -3.907510155640205E-14 1.198521669382006E-13 -3.902839501026754E-11 4.969878451103367E-14 -5.075086085683618E-12 2.362871452737235E-15
tp 3.30149122096738E-11 -3.902839501026754E-11 5.244529495476474E-7 5.564616169314824E-10 8.76189517050344E-8 7.489380526132915E-11
node -3.616520042292001E-14 4.969878451103367E-14 5.564616169314824E-10 4.268288786273834E-9 -4.108665969153666E-9 -1.490815627162302E-10
peri 5.029065736028455E-12 -5.075086085683618E-12 8.76189517050344E-8 -4.108665969153666E-9 1.887306466952134E-8 1.596179532948827E-10
i 2.212740600064625E-14 2.362871452737235E-15 7.489380526132915E-11 -1.490815627162302E-10 1.596179532948827E-10 1.687348260198045E-10

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 16.8   n/a MPO349179  

441435 (2008 HE8)          Discovered 2008-Apr-03 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2008 HE8 = 2011 XN2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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