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173958 (2001 XR20)
Classification: Main-belt Asteroid          SPK-ID: 2173958
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2685547966176199 5.9613e-08  
a 3.164856600522016 3.0236e-08 au
q 2.314919179844894 1.8848e-07 au
i 22.33305156433063 8.4911e-06 deg
node 291.4743763996681 2.0851e-05 deg
peri 105.5858450927873 2.7625e-05 deg
M 133.0920742144502 1.8116e-05 deg
tp 2458240.210180804373
(2018-May-01.71018080)
9.8478e-05 TDB
period 2056.503638747173
5.63
2.947e-05
8.068e-08
d
yr
n .1750543948559765 2.5086e-09 deg/d
Q 4.014794021199138 3.8356e-08 au
  Orbit Determination Parameters
   # obs. used (total)      348  
   data-arc span      7208 days (19.73 yr)  
   first obs. used      2000-08-03  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59293  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:33:45  

Additional Information
 Earth MOID = 1.4335 au 
 Jupiter MOID = 1.84327 au 
 T_jup = 3.034 
[ 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 14.7   n/a MPO469866  
diameter diameter 6.915 km 0.649 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173958 (2001 XR20)          Discovered 2001-Dec-09 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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