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469859 (2005 UD18)
Classification: Main-belt Asteroid          SPK-ID: 2469859
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1632988688676061 5.35e-08  
a 2.396616194290967 1.4208e-08 au
q 2.005251480653465 1.2427e-07 au
i 4.134228657614098 6.3315e-06 deg
node 221.5452953131242 5.5479e-05 deg
peri 147.330234352341 5.8026e-05 deg
M 44.60337501252687 1.6284e-05 deg
tp 2459032.595868643308
(2020-Jul-02.09586864)
6.0792e-05 TDB
period 1355.177433802556
3.71
1.2051e-05
3.299e-08
d
yr
n .2656478709137438 2.3623e-09 deg/d
Q 2.787980907928469 1.6528e-08 au
  Orbit Determination Parameters
   # obs. used (total)      198  
   data-arc span      5591 days (15.31 yr)  
   first obs. used      2005-09-26  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5668  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 16:20:34  

Additional Information
 Earth MOID = 1.0047 au 
 Jupiter MOID = 2.68627 au 
 T_jup = 3.507 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458216.5 (2018-Apr-08.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1647054744031648 5.3657e-08  
q 2.001255947183609 1.2478e-07 au
tp 2457677.202165113889
(2016-Oct-15.70216511)
5.7287e-05 TDB
node 221.5791784804381 5.5417e-05 deg
peri 147.2419471207589 5.7921e-05 deg
i 4.136909259977555 6.3366e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      198  
   data-arc span      5591 days (15.31 yr)  
   first obs. used      2005-09-26  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5668  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 16:20:34  

Additional Information
 Jupiter MOID = 2.68627 au 
 T_jup = 3.507 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.879026216497895E-15 -6.66917835409169E-15 1.286193772368013E-12 -7.077654857984474E-15 3.519572099166226E-13 -3.60730396868558E-15
q -6.66917835409169E-15 1.557010973167434E-14 -2.990545851659678E-12 1.670892190282706E-14 -8.039718715818317E-13 8.838313469287315E-15
tp 1.286193772368013E-12 -2.990545851659678E-12 3.281743811669887E-9 6.979711424073266E-14 9.707322945793197E-10 -2.944960958413693E-12
node -7.077654857984474E-15 1.670892190282706E-14 6.979711424073266E-14 3.07109665844145E-9 -3.062134247268291E-9 3.475873387011819E-11
peri 3.519572099166226E-13 -8.039718715818317E-13 9.707322945793197E-10 -3.062134247268291E-9 3.354870696512747E-9 -3.542114396889131E-11
i -3.60730396868558E-15 8.838313469287315E-15 -2.944960958413693E-12 3.475873387011819E-11 -3.542114396889131E-11 4.015307029943293E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.79   n/a MPCxxxxx  

469859 (2005 UD18)          Discovered 2005-Sep-26 by Spacewatch at Kitt Peak
Reference: Last Updated: 2016-08-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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