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20634 Marichardson (1999 TP94)
Classification: Main-belt Asteroid          SPK-ID: 2020634
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .142954292095423 3.3898e-08  
a 2.448606035056419 9.2276e-09 au
q 2.098567292694348 8.4091e-08 au
i 5.638866061121553 4.0473e-06 deg
node 59.72103154008244 3.5757e-05 deg
peri 120.8032889176848 3.8386e-05 deg
M 28.25570120136269 1.4767e-05 deg
tp 2459090.654975822557
(2020-Aug-29.15497582)
5.7221e-05 TDB
period 1399.512559326348
3.83
7.9111e-06
2.166e-08
d
yr
n .2572324182451676 1.4541e-09 deg/d
Q 2.79864477741849 1.0547e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1784  
   data-arc span      13993 days (38.31 yr)  
   first obs. used      1982-02-21  
   last obs. used      2020-06-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48975  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:25:40  

Additional Information
 Earth MOID = 1.10716 au 
 Jupiter MOID = 2.16891 au 
 T_jup = 3.476 
[ 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 14.26   n/a E2021B10  
diameter diameter 2.861 km 0.994 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.542   0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20634 Marichardson           Discovered 1999 Oct. 2 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Matthew Richardson (b. 1987) was awarded first place in the 2004 Intel International Science and Engineering Fair for his botany project. He attends the Walton High School, DeFuniak Springs, Florida, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041226/MPCPages.arcLast Updated: 2004-12-25

[ show close-approach data ]
Alternate Designations
 1999 TP94 = 1982 DH1 = 1994 LC5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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