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221371 (2005 XU)
Classification: Main-belt Asteroid          SPK-ID: 2221371
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1971208635609777 5.9117e-08  
a 2.582106653236301 2.1177e-08 au
q 2.073119559943815 1.6266e-07 au
i 7.869601731745968 6.3164e-06 deg
node 169.49901695 2.8402e-05 deg
peri 227.6314372334936 3.2231e-05 deg
M 198.77280468152 1.7921e-05 deg
tp 2459679.227569486669
(2022-Apr-09.72756949)
8.166e-05 TDB
period 1515.51309028567
4.15
1.8644e-05
5.104e-08
d
yr
n .2375433127615817 2.9223e-09 deg/d
Q 3.091093746528787 2.5352e-08 au
  Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      8105 days (22.19 yr)  
   first obs. used      1998-02-17  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56893  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 09:59:19  

Additional Information
 Earth MOID = 1.08879 au 
 Jupiter MOID = 2.36702 au 
 T_jup = 3.383 
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Orbital Elements at Epoch 2457515.5 (2016-May-07.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1970681966505606 5.8951e-08  
q 2.073308462765577 1.6209e-07 au
tp 2458164.754681766879
(2018-Feb-15.25468177)
6.8666e-05 TDB
node 169.51039485913 2.8402e-05 deg
peri 227.876778014878 3.2262e-05 deg
i 7.869400927178201 6.3164e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      8105 days (22.19 yr)  
   first obs. used      1998-02-17  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56893  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 09:59:19  

Additional Information
 Jupiter MOID = 2.36702 au 
 T_jup = 3.383 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.475253087883995E-15 -9.518451145863742E-15 -2.788189241405169E-12 2.01453339799846E-14 -5.814153866611388E-13 -2.421043941116902E-15
q -9.518451145863742E-15 2.62719974110315E-14 7.935540043597266E-12 -5.69597721309216E-14 1.638145027838006E-12 7.055635697866787E-15
tp -2.788189241405169E-12 7.935540043597266E-12 4.714962460279124E-9 -2.863248012672403E-11 1.053255583039922E-9 3.283266370726789E-12
node 2.01453339799846E-14 -5.69597721309216E-14 -2.863248012672403E-11 8.066925526204239E-10 -8.043491764950555E-10 3.556209354669663E-11
peri -5.814153866611388E-13 1.638145027838006E-12 1.053255583039922E-9 -8.043491764950555E-10 1.040837085988495E-9 -3.448577639087149E-11
i -2.421043941116902E-15 7.055635697866787E-15 3.283266370726789E-12 3.556209354669663E-11 -3.448577639087149E-11 3.989718623401197E-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 16.1   n/a MPO433450  
diameter diameter 1.656 km 0.401 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.194   0.064 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

221371 (2005 XU)          Discovered 2005-Dec-02 by Lowe, A. at Mayhill
Reference: 20091004/Numbers.arcLast Updated: 2009-10-06

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Alternate Designations
 2005 XU = 1998 DY31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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