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20817 Liuxiaofeng (2000 TT50)
Classification: Main-belt Asteroid          SPK-ID: 2020817
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1047700543568372 3.4005e-08  
a 2.766365680966673 1.2483e-08 au
q 2.476533398200906 9.5784e-08 au
i 9.868788211370582 3.8833e-06 deg
node 117.5309229088145 2.0911e-05 deg
peri 127.8986612636491 2.7754e-05 deg
M 272.736027964411 1.9059e-05 deg
tp 2459607.875855465905
(2022-Jan-28.37585547)
8.9389e-05 TDB
period 1680.594001702274
4.60
1.1375e-05
3.114e-08
d
yr
n .2142099755415978 1.4499e-09 deg/d
Q 3.05619796373244 1.3791e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1675  
   data-arc span      10275 days (28.13 yr)  
   first obs. used      1993-01-26  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53347  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:32:05  

Additional Information
 Earth MOID = 1.47492 au 
 Jupiter MOID = 2.03299 au 
 T_jup = 3.310 
[ 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 14.22   n/a E2021B10  
rotation period rot_per 80.4198 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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