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438908 (2009 XO)
Classification: Apollo [NEO, PHA]          SPK-ID: 2438908
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 94 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5423186828345099 8.4584e-09  
a 1.859360224254007 1.0374e-09 au
q .8509944365216952 1.5594e-08 au
i .3507989926344524 1.8949e-06 deg
node 27.72766474214903 0.00018005 deg
peri 140.7103206966986 0.00018001 deg
M 25.34781582343452 4.776e-07 deg
tp 2458935.294868765262
(2020-Mar-26.79486877)
1.2418e-06 TDB
period 926.0698202960662
2.54
7.7503e-07
2.122e-09
d
yr
n .3887395875668504 3.2534e-10 deg/d
Q 2.86772601198632 1.6e-09 au
  Orbit Determination Parameters
   # obs. used (total)      681  
   # delay obs. used      3  
   # Doppler obs. used      1  
   data-arc span      3868 days (10.59 yr)  
   first obs. used      2009-12-09  
   last obs. used      2020-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .31056  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-13 07:10:17  

Additional Information
 Earth MOID = .00183729 au 
 Jupiter MOID = 2.10679 au 
 T_jup = 3.803 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457821.5 (2017-Mar-09.0) TDB
Reference: JPL 94 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5417875909231999 8.5013e-09  
q .8498683540470193 1.556e-08 au
tp 2458012.750679105449
(2017-Sep-16.25067911)
1.7017e-06 TDB
node 27.87247816394366 0.00017723 deg
peri 140.4641168091063 0.0001772 deg
i .3539475341223449 1.893e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      681  
   # delay obs. used      3  
   # Doppler obs. used      1  
   data-arc span      3868 days (10.59 yr)  
   first obs. used      2009-12-09  
   last obs. used      2020-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .31056  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jul-13 07:10:17  

Additional Information
 Jupiter MOID = 2.10679 au 
 T_jup = 3.803 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.227200410832753E-17 -1.322287554705169E-16 -1.324691262010113E-14 -8.327382562567492E-14 6.079066201573272E-14 -6.56788400248779E-16
q -1.322287554705169E-16 2.421179854451929E-16 2.39413083180816E-14 1.570110956151291E-13 -1.158403719707261E-13 1.260110818316627E-15
tp -1.324691262010113E-14 2.39413083180816E-14 2.895622533505495E-12 5.867318064458062E-14 4.027839650751604E-12 2.783728842845642E-14
node -8.327382562567492E-14 1.570110956151291E-13 5.867318064458062E-14 3.141140587027868E-8 -3.140194182621898E-8 2.584738728520804E-10
peri 6.079066201573272E-14 -1.158403719707261E-13 4.027839650751604E-12 -3.140194182621898E-8 3.139950877040652E-8 -2.582950357534815E-10
i -6.56788400248779E-16 1.260110818316627E-15 2.783728842845642E-14 2.584738728520804E-10 -2.582950357534815E-10 3.583623853325228E-12

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 20.5   n/a MPO346169  

438908 (2009 XO)          Discovered 2009-Dec-09 by OAM at La Sagra
Reference: Last Updated: 2015-07-06

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