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20642 Laurajohnson (1999 TC124)
Classification: Main-belt Asteroid          SPK-ID: 2020642
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1354496410325774 7.6074e-08  
a 3.111810174359084 4.4385e-08 AU
q 2.690316603280624 2.2541e-07 AU
i 5.189327447345272 8.7489e-06 deg
node 168.6762958986967 7.225e-05 deg
peri 250.7801299951551 7.8049e-05 deg
M 248.9232519705429 3.177e-05 deg
tp 2457619.141040006629
(2016-Aug-18.64104001)
0.00018146 JED
period 2005.017056705014
5.49
4.2898e-05
1.174e-07
d
yr
n .1795495947508863 3.8415e-09 deg/d
Q 3.533303745437544 5.0397e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      573  
   data-arc span      5845 days (16.00 yr)  
   first obs. used      1997-05-02  
   last obs. used      2013-05-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56396  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:46:04  

Additional Information
 Earth MOID = 1.70791 AU 
 T_jup = 3.198 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2 mag n/a MPO263532  

20642 Laurajohnson           Discovered 1999 Oct. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Laura Johnson (b. 1987) was awarded second place in the 2004 Intel International Science and Engineering Fair for her botany team project. She attends the Upper Arlington High School, Upper Arlington, Ohio, 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 TC124 = 1998 ME39 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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