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213414 (2001 WU81)
Classification: Main-belt Asteroid          SPK-ID: 2213414
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05187670922101595 6.0401e-08  
a 3.007879573937108 3.6897e-08 au
q 2.851840679908139 2.0045e-07 au
i 7.865502891201356 6.6377e-06 deg
node 234.7447987507708 5.3264e-05 deg
peri 9.101954431303856 9.2449e-05 deg
M 61.15850876363958 7.4993e-05 deg
tp 2458876.799418013675
(2020-Jan-28.29941801)
0.00039726 TDB
period 1905.412866841491
5.22
3.506e-05
9.599e-08
d
yr
n .1889354303546582 3.4764e-09 deg/d
Q 3.163918467966077 3.8811e-08 au
  Orbit Determination Parameters
   # obs. used (total)      314  
   data-arc span      6403 days (17.53 yr)  
   first obs. used      2001-11-20  
   last obs. used      2019-06-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54404  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:42:36  

Additional Information
 Earth MOID = 1.83772 au 
 Jupiter MOID = 1.84136 au 
 T_jup = 3.234 
[ 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 15.53   n/a MPCxxxxx  
diameter diameter 4.599 km 0.225 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.058   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

213414 (2001 WU81)          Discovered 2001-Nov-20 by LINEAR at Socorro
Reference: 20090509/Numbers.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 2001 WU81 = 2005 QQ39 = 2006 TD91 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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