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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1967679661349918 4.0248e-08  
a 2.337212571183873 8.381e-09 au
q 1.877324007126887 9.5884e-08 au
i 8.892005024048265 6.4681e-06 deg
node 342.9137206466883 2.4816e-05 deg
peri 44.45951323623171 3.0445e-05 deg
M 80.51467482739878 1.7706e-05 deg
tp 2458908.610622875407
(2020-Feb-29.11062288)		 6.3337e-05 TDB
period 1305.105882748908
3.57		 7.02e-06
1.922e-08		 d
yr
n .2758396883797213 1.4837e-09 deg/d
Q 2.797101135240859 1.003e-08 au
   Orbit Determination Parameters
   # obs. used (total)      982  
   data-arc span      9179 days (25.13 yr)  
   first obs. used      1996-01-25  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54807  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:26  

Additional Information
 Earth MOID = .890602 au 
 Jupiter MOID = 2.70622 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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