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499123 (2009 KZ2)
Classification: Main-belt Asteroid          SPK-ID: 2499123
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2554218554332171 6.7995e-08  
a 2.411455421140016 1.7581e-08 au
q 1.795517003177943 1.6751e-07 au
i 11.44097255363315 9.7252e-06 deg
node 38.4172111895977 5.3027e-05 deg
peri 198.3705750596295 5.8575e-05 deg
M 342.1351680305589 2.3389e-05 deg
tp 2459068.375605774111
(2020-Aug-06.87560577)
8.9076e-05 TDB
period 1367.783258218034
3.74
1.4958e-05
4.095e-08
d
yr
n .2631995952845723 2.8783e-09 deg/d
Q 3.027393839102089 2.2072e-08 au
  Orbit Determination Parameters
   # obs. used (total)      117  
   data-arc span      5517 days (15.10 yr)  
   first obs. used      2005-03-16  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60782  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 06:11:48  

Additional Information
 Earth MOID = .788297 au 
 Jupiter MOID = 1.98971 au 
 T_jup = 3.448 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457962.5 (2017-Jul-28.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2554840923870345 6.8058e-08  
q 1.795557573709292 1.6768e-07 au
tp 2457699.561280999937
(2016-Nov-07.06128100)
8.5765e-05 TDB
node 38.42995832453511 5.3012e-05 deg
peri 198.2146276936864 5.8555e-05 deg
i 11.442618659565 9.7276e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      117  
   data-arc span      5517 days (15.10 yr)  
   first obs. used      2005-03-16  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60782  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 06:11:48  

Additional Information
 Jupiter MOID = 1.98971 au 
 T_jup = 3.448 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.631863954823807E-15 -1.137891080999195E-14 -2.304178217144166E-12 -4.652082090687552E-14 -3.850983755674565E-13 -1.197421827718213E-14
q -1.137891080999195E-14 2.811668504954205E-14 5.710041253398681E-12 1.237739673455883E-13 9.665995201067845E-13 2.92817675289617E-14
tp -2.304178217144166E-12 5.710041253398681E-12 7.355598012280197E-9 6.646887879338227E-13 2.230125310609612E-9 4.580584474738155E-11
node -4.652082090687552E-14 1.237739673455883E-13 6.646887879338227E-13 2.810273968160915E-9 -2.756879780656396E-9 -3.544679117090596E-10
peri -3.850983755674565E-13 9.665995201067845E-13 2.230125310609612E-9 -2.756879780656396E-9 3.428742228655476E-9 3.612261693526683E-10
i -1.197421827718213E-14 2.92817675289617E-14 4.580584474738155E-11 -3.544679117090596E-10 3.612261693526683E-10 9.46261396333045E-11

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 17.3   n/a MPO158355  

499123 (2009 KZ2)          Discovered 2009-May-20 by Lowe, A. at Mayhill
Reference: Last Updated: 2017-10-09

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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