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173971 (2001 XP91)
Classification: Main-belt Asteroid          SPK-ID: 2173971
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03884624286482991 4.5436e-08  
a 3.043440297851296 3.0418e-08 au
q 2.925214076896354 1.4865e-07 au
i 9.761225930815142 5.5024e-06 deg
node 59.34941691528245 3.0975e-05 deg
peri 257.7074492652305 7.9772e-05 deg
M 273.2643268329552 7.4113e-05 deg
tp 2459467.740908501305
(2021-Sep-10.24090850)
0.00039977 TDB
period 1939.302721920648
5.31
2.9074e-05
7.96e-08
d
yr
n .1856337310987028 2.783e-09 deg/d
Q 3.161666518806237 3.16e-08 au
  Orbit Determination Parameters
   # obs. used (total)      397  
   data-arc span      6744 days (18.46 yr)  
   first obs. used      2001-11-09  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58808  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:33:45  

Additional Information
 Earth MOID = 1.9311 au 
 Jupiter MOID = 1.95649 au 
 T_jup = 3.216 
[ 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 15.2   n/a MPO436864  
diameter diameter 4.516 km 0.411 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.079   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

173971 (2001 XP91)          Discovered 2001-Dec-10 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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