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266836 (2009 UK18)
Classification: Outer Main-belt Asteroid          SPK-ID: 2266836
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1516446138489458 9.8772e-08  
a 3.220459478590078 6.8043e-08 au
q 2.732094144543109 2.9885e-07 au
i 22.86603030222214 9.7478e-06 deg
node 67.65614545708183 1.6423e-05 deg
peri 350.7907099607947 3.5773e-05 deg
M 311.5448270799453 2.4323e-05 deg
tp 2459484.627213671092
(2021-Sep-27.12721367)
0.0001426 TDB
period 2110.936578233923
5.78
6.6901e-05
1.832e-07
d
yr
n .1705404149570365 5.4049e-09 deg/d
Q 3.708824812637048 7.8361e-08 au
  Orbit Determination Parameters
   # obs. used (total)      343  
   data-arc span      7949 days (21.76 yr)  
   first obs. used      1998-12-14  
   last obs. used      2020-09-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55363  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 03:17:25  

Additional Information
 Earth MOID = 1.74646 au 
 Jupiter MOID = 1.64558 au 
 T_jup = 3.049 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457128.5 (2015-Apr-16.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1537702450101052 1.0479e-07  
q 2.726391565756927 3.211e-07 au
tp 2457348.230070476909
(2015-Nov-21.73007048)
0.00014477 TDB
node 67.83397190743511 1.6435e-05 deg
peri 347.3889418012526 3.4742e-05 deg
i 22.87281240929466 9.7732e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      343  
   data-arc span      7949 days (21.76 yr)  
   first obs. used      1998-12-14  
   last obs. used      2020-09-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55363  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 03:17:25  

Additional Information
 Jupiter MOID = 1.64558 au 
 T_jup = 3.049 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.098002123927114E-14 -3.326699274418206E-14 -6.546848067606743E-12 -2.257208600416129E-14 -1.520769247991265E-12 -2.232487366562922E-14
q -3.326699274418206E-14 1.031023177070909E-13 1.890749110831259E-11 4.859872815579213E-14 4.366155430661206E-12 8.372127423403564E-14
tp -6.546848067606743E-12 1.890749110831259E-11 2.095705791353882E-8 2.832742205382858E-11 4.465428957069061E-9 -1.265711828556862E-11
node -2.257208600416129E-14 4.859872815579213E-14 2.832742205382858E-11 2.701176751368144E-10 -2.410406329900118E-10 -5.682619961239494E-11
peri -1.520769247991265E-12 4.366155430661206E-12 4.465428957069061E-9 -2.410406329900118E-10 1.207035662560205E-9 4.986816348900742E-11
i -2.232487366562922E-14 8.372127423403564E-14 -1.265711828556862E-11 -5.682619961239494E-11 4.986816348900742E-11 9.551601156471232E-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 14.9   n/a MPO440312  
diameter diameter 4.663 km 0.203 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.098   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

266836 (2009 UK18)          Discovered 2009-Oct-20 by Sachs, J. at Tzec Maun
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22

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