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20430 Stout (1999 AC3)
Classification: Main-belt Asteroid          SPK-ID: 2020430
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1997888475709414 3.4403e-08  
a 2.647639206267583 1.2383e-08 au
q 2.118670420463741 8.8519e-08 au
i 14.74896759635632 3.8191e-06 deg
node 132.0839413170493 1.5681e-05 deg
peri 213.3752941605862 1.8713e-05 deg
M 139.7492979491024 1.1282e-05 deg
tp 2458589.651142156347
(2019-Apr-16.15114216)
4.7778e-05 TDB
period 1573.572046879307
4.31
1.1039e-05
3.022e-08
d
yr
n .2287788479173538 1.605e-09 deg/d
Q 3.176607992071426 1.4857e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1180  
   data-arc span      14767 days (40.43 yr)  
   first obs. used      1980-10-14  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54506  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 03:03:39  

Additional Information
 Earth MOID = 1.12237 au 
 Jupiter MOID = 2.24781 au 
 T_jup = 3.317 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.70   n/a MPCxxxxx  
diameter diameter 3.393 km 0.107 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.243   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20430 Stout           Discovered 1999 Jan. 10 by W. R. Cooney, Jr., and S. Lazar at Baton Rouge.
A music professor at Louisiana State University who was fascinated by the mysteries of space being revealed in his time and was always researching new ideas, Earl Douglas Stout (1895?--1985) was a great-grandfather of the second discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020624/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1999 AC3 = 1995 FR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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