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20638 Lingchen (1999 TV108)
Classification: Main-belt Asteroid          SPK-ID: 2020638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06442241906657228 4.1414e-08  
a 2.729849995031021 1.3738e-08 au
q 2.553986454662252 1.1458e-07 au
i 4.15549742103863 3.7348e-06 deg
node 245.8447867936664 6.2633e-05 deg
peri 91.61877438079559 6.8982e-05 deg
M 231.6870563930486 3.015e-05 deg
tp 2459587.684481401817
(2022-Jan-08.18448140)
0.00013898 TDB
period 1647.428601998045
4.51
1.2436e-05
3.405e-08
d
yr
n .2185223684737429 1.6496e-09 deg/d
Q 2.90571353539979 1.4623e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1556  
   data-arc span      8519 days (23.32 yr)  
   first obs. used      1997-03-11  
   last obs. used      2020-07-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50807  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:01:37  

Additional Information
 Earth MOID = 1.54878 au 
 Jupiter MOID = 2.33223 au 
 T_jup = 3.348 
[ 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 14.1   n/a MPO467946  
diameter diameter 8.081 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.082   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20638 Lingchen           Discovered 1999 Oct. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Ling Chen (b. 1986) was awarded second place in the 2004 Intel International Science and Engineering Fair for his botany project. He attends the JinCai Senior High School, Shanghai, 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
 1999 TV108 = 1995 YE21 = 1997 EL43 = 1998 KM64 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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