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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 
[ 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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1981-May-22 02:03 00:03 Hebe 0.0228331590718812 0.0228209473216483 0.0228453708487084 3.1205529643206 3.12055287707169 2444746.585570777 3.29653684062506 609.565142387339 44.1611209614313 -3.668373586814 7458.4221854105 T 20 CATAB v2.0f-lin.ifort 2020-May-21 09:59:38 2020-May-21 09:59

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