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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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1971208539431788 5.7972e-08  
a 2.582106653012958 2.1166e-08 au
q 2.073119584598681 1.5997e-07 au
i 7.869603337675103 5.3383e-06 deg
node 169.4990151429011 2.8285e-05 deg
peri 227.6314443612761 3.1349e-05 deg
M 198.772800341647 1.7057e-05 deg
tp 2459679.227587668426
(2022-Apr-09.72758767)
7.8385e-05 TDB
period 1515.51309008904
4.15
1.8635e-05
5.102e-08
d
yr
n .2375433127924016 2.9208e-09 deg/d
Q 3.091093721427236 2.5339e-08 au
  Orbit Determination Parameters
   # obs. used (total)      472  
   data-arc span      8161 days (22.34 yr)  
   first obs. used      1998-02-17  
   last obs. used      2020-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55687  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 03:02:59  

Additional Information
 Earth MOID = 1.08879 au 
 Jupiter MOID = 2.36702 au 
 T_jup = 3.383 
[ show covariance matrix ]

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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