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43090 (1999 WF20)
Classification: Main-belt Asteroid          SPK-ID: 2043090
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1739136938223214 3.6567e-08  
a 2.681344056671491 1.4199e-08 au
q 2.215021607367224 1.0032e-07 au
i 12.05303569758477 4.2327e-06 deg
node 237.0058459564216 2.2843e-05 deg
peri 40.80458357637561 2.6595e-05 deg
M 33.891919488269 1.4499e-05 deg
tp 2459049.519482981727
(2020-Jul-19.01948298)
6.4298e-05 TDB
period 1603.715190737175
4.39
1.2739e-05
3.488e-08
d
yr
n .2244787616150969 1.7831e-09 deg/d
Q 3.147666505975757 1.6668e-08 au
  Orbit Determination Parameters
   # obs. used (total)      984  
   data-arc span      8207 days (22.47 yr)  
   first obs. used      1998-06-24  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53705  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:15:40  

Additional Information
 Earth MOID = 1.21215 au 
 Jupiter MOID = 1.98924 au 
 T_jup = 3.323 
[ 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 14.56   n/a E2021B10  
diameter diameter 3.515 km 0.600 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.272   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

43090 (1999 WF20)          Discovered 1999-Nov-16 by LINEAR at Socorro
Reference: 20020624/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 WF20 = 1998 MF21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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