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20313 Fredrikson (1998 FM122)
Classification: Main-belt Asteroid          SPK-ID: 2020313
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .100858276812883 4.2529e-08  
a 2.53758911110244 9.5276e-09 au
q 2.281652246097512 1.0598e-07 au
i 5.831540096233616 3.528e-06 deg
node 196.7303118674249 4.1693e-05 deg
peri 103.0784030767282 4.4865e-05 deg
M 127.4369550413416 1.6584e-05 deg
tp 2458677.835184859637
(2019-Jul-13.33518486)
6.7462e-05 TDB
period 1476.489558225008
4.04
8.3154e-06
2.277e-08
d
yr
n .2438215685268924 1.3732e-09 deg/d
Q 2.793525976107368 1.0489e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1281  
   data-arc span      9794 days (26.81 yr)  
   first obs. used      1994-04-06  
   last obs. used      2021-01-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50784  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:16:51  

Additional Information
 Earth MOID = 1.27305 au 
 Jupiter MOID = 2.38458 au 
 T_jup = 3.433 
[ 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 14.9   n/a MPO302189  
diameter diameter 5.112 km 0.131 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.089   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20313 Fredrikson           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Robert Fredrikson mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. He teaches at the Cranbrook Kingswood School, Bloomfield Hills, Michigan.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040415/MPCPages.arcLast Updated: 2004-04-20

[ show close-approach data ]
Alternate Designations
 1998 FM122 = 1999 RC146 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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