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3643 Tienchanglin (1978 UN2)
Classification: Main-belt Asteroid          SPK-ID: 2003643
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1509141484053928 4.258e-08  
a 2.402470442310075 7.85e-09 au
q 2.039903661439722 1.0192e-07 au
i 13.87823560056928 4.7382e-06 deg
node 56.77815811477542 1.4652e-05 deg
peri 4.455325006450362 2.0862e-05 deg
M 46.93046121318264 1.2752e-05 deg
tp 2458823.188122576810
(2019-Dec-05.68812258)
4.8326e-05 TDB
period 1360.145931283075
3.72
6.6664e-06
1.825e-08
d
yr
n .2646774818202036 1.2972e-09 deg/d
Q 2.765037223180427 9.0347e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2042  
   data-arc span      30094 days (82.39 yr)  
   first obs. used      1937-11-30  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43301  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:56:59  

Additional Information
 Earth MOID = 1.05276 au 
 Jupiter MOID = 2.58341 au 
 T_jup = 3.470 
[ 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 13.0   n/a MPO358664  
diameter diameter 9.775 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.135   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3643 Tienchanglin           Discovered 1978 Oct. 29 at the Purple Mountain Observatory.
Chang-lin Tien (b. 1935) was the seventh chancellor of the University of California at Berkeley, serving from 1990 to 1997, and is now the Nippon Electric Company distinguished professor of engineering there. His professional work is mainly in energy, environment and high-tech areas.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990928/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1978 UN2 = 1937 WK = 1963 TY = 1967 TJ = 1978 WY14 = 1983 AS 
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