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173985 (2001 XB157)
Classification: Outer Main-belt Asteroid          SPK-ID: 2173985
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0903500921323616 4.2165e-08  
a 3.222080792550019 3.2672e-08 au
q 2.930965496085213 1.2913e-07 au
i 15.29516009466205 7.8607e-06 deg
node 299.0664220913941 1.7904e-05 deg
peri 107.5108830056969 5.0799e-05 deg
M 100.9245089171416 4.6213e-05 deg
tp 2458408.260717828409
(2018-Oct-16.76071783)
0.00026941 TDB
period 2112.530879459752
5.78
3.2132e-05
8.797e-08
d
yr
n .1704117101909841 2.592e-09 deg/d
Q 3.513196089014827 3.5624e-08 au
  Orbit Determination Parameters
   # obs. used (total)      518  
   data-arc span      7148 days (19.57 yr)  
   first obs. used      2000-09-27  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57647  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:34:20  

Additional Information
 Earth MOID = 1.98755 au 
 Jupiter MOID = 1.8345 au 
 T_jup = 3.127 
[ 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 14.6   n/a MPO385764  
diameter diameter 6.197 km 0.211 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.026   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

173985 (2001 XB157)          Discovered 2001-Dec-14 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 2001 XB157 = 2000 SK314 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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