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20817 Liuxiaofeng (2000 TT50)
Classification: Main-belt Asteroid          SPK-ID: 2020817
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1064697081329749 6.9125e-08  
a 2.764439504764842 3.4879e-08 AU
q 2.470110437541263 1.8315e-07 AU
i 9.874524008962933 9.1604e-06 deg
node 117.6095326975344 4.361e-05 deg
peri 128.0782390419048 6.5103e-05 deg
M 161.1244359468412 4.8843e-05 deg
tp 2456249.105568985451
(2012-Nov-17.60556899)
0.00022738 JED
period 1678.839051169636
4.60
3.1773e-05
8.699e-08
d
yr
n .2144338968939222 4.0583e-09 deg/d
Q 3.05876857198842 3.8592e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      600  
   data-arc span      7920 days (21.68 yr)  
   first obs. used      1993-01-26  
   last obs. used      2014-10-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59066  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:42:46  

Additional Information
 Earth MOID = 1.47157 AU 
 T_jup = 3.310 
[ 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 14.0 mag n/a MPO267785  

20817 Liuxiaofeng           Discovered 2000 Oct. 1 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Liu Xiaofeng (b. 1986) was awarded second place in the 2004 Intel International Science and Engineering Fair for his environmental science project. He attends the Fuzhou No.1 Middle School, Fuzhou, Fujian, China.
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
 2000 TT50 = 1998 FK84 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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