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101571 (1999 AF39)
Classification: Main-belt Asteroid          SPK-ID: 2101571
[ 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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1966422910793982 4.7704e-08  
a 2.336873309826051 9.4871e-09 au
q 1.87734518821956 1.1496e-07 au
i 8.891745203251025 6.729e-06 deg
node 342.9173866400144 2.732e-05 deg
peri 44.43860249277472 3.238e-05 deg
M 25.36780246642183 1.776e-05 deg
tp 2458908.554278310694
(2020-Feb-29.05427831)		 6.4072e-05 TDB
period 1304.8217263582
3.57		 7.9458e-06
2.175e-08		 d
yr
n .2758997591224755 1.6801e-09 deg/d
Q 2.796401431432542 1.1353e-08 au
   Orbit Determination Parameters
   # obs. used (total)      818  
   data-arc span      9034 days (24.73 yr)  
   first obs. used      1996-01-25  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57019  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:59:46  

Additional Information
 Earth MOID = .891888 au 
 Jupiter MOID = 2.70573 au 
 T_jup = 3.525 
[ 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 15.3   n/a MPO502726  
diameter diameter 2.163 km 0.361 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.344   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

101571 (1999 AF39)          Discovered 1999-Jan-09 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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