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18238 Frankshu (1241 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2018238
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09265271535406357 3.8984e-08  
a 3.06084023464902 2.0811e-08 au
q 2.777245075643819 1.2654e-07 au
i 8.782014928076972 6.0262e-06 deg
node 4.543504051041047 2.9326e-05 deg
peri 286.1440064039931 4.5627e-05 deg
M 357.5615890580416 3.434e-05 deg
tp 2459213.748411740166
(2020-Dec-30.24841174)
0.00018655 TDB
period 1955.957523152028
5.36
1.9949e-05
5.462e-08
d
yr
n .1840530766843338 1.8771e-09 deg/d
Q 3.344435393654221 2.274e-08 au
  Orbit Determination Parameters
   # obs. used (total)      789  
   data-arc span      17139 days (46.92 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57002  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:34  

Additional Information
 Earth MOID = 1.77622 au 
 Jupiter MOID = 1.88845 au 
 T_jup = 3.209 
[ 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 14.41   n/a E2021B10  
diameter diameter 4.798 km 0.269 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.133   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18238 Frankshu           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Frank Shu (b. 1943), president of National Tsinghua University in Taiwan and former professor at the University of California in Berkeley, is well known for his fundamental contributions to the theory of star formation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050919/MPCPages.arcLast Updated: 2005-09-26

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Alternate Designations
 1241 T-2 = 1998 FP142 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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