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21064 Yangliwei (1991 LY1)
Classification: Main-belt Asteroid          SPK-ID: 2021064
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1324124890721827 3.19e-08  
a 3.176838104360132 1.7826e-08 au
q 2.756185063582453 9.8444e-08 au
i 2.601932652656534 3.4885e-06 deg
node 81.29307496530537 8.8841e-05 deg
peri 158.7028323055214 9.0274e-05 deg
M 78.46750324486558 1.5346e-05 deg
tp 2458749.705732289173
(2019-Sep-23.20573229)
8.8743e-05 TDB
period 2068.192941853501
5.66
1.7408e-05
4.766e-08
d
yr
n .1740649978610653 1.4651e-09 deg/d
Q 3.597491145137812 2.0187e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1404  
   data-arc span      10767 days (29.48 yr)  
   first obs. used      1991-05-18  
   last obs. used      2020-11-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50075  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:38:12  

Additional Information
 Earth MOID = 1.74254 au 
 Jupiter MOID = 1.40998 au 
 T_jup = 3.185 
[ 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 14.06   n/a E2021B10  
diameter diameter 7.490 km 1.522 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.079   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21064 Yangliwei           Discovered 1991 June 6 by E. W. Elst at the European Southern Observatory.
Yang Liwei (b. 1965) was the first from China to orbit the earth. His Shenzou V space capsule was launched in Oct. 2003. After completing 14 revolutions he landed safely in the grasslands of China's Inner Mongolai province.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040107/MPCPages.arcLast Updated: 2004-01-07

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Alternate Designations
 1991 LY1 = 1999 VT38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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