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21623 Albertshieh (1999 LS24)
Classification: Main-belt Asteroid          SPK-ID: 2021623
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08840477047883315 1.175e-08  
a 2.38374333229497 8.0921e-09 au
q 2.173009050122984 3.056e-08 au
i 3.29143685267239 7.9375e-07 deg
node 248.8492969156891 1.8408e-05 deg
peri 286.9502112800825 2.3812e-05 deg
M 18.17054167990727 1.5051e-05 deg
tp 2459132.649502371719
(2020-Oct-10.14950237)
5.6076e-05 TDB
period 1344.2735817387
3.68
6.8451e-06
1.874e-08
d
yr
n .2678026295319823 1.3637e-09 deg/d
Q 2.594477614466955 8.8075e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2088  
   data-arc span      10984 days (30.07 yr)  
   first obs. used      1991-02-08  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49987  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:50:43  

Additional Information
 Earth MOID = 1.17928 au 
 Jupiter MOID = 2.37937 au 
 T_jup = 3.529 
[ 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 14.0   n/a MPO358835  
diameter diameter 3.829 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.332   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21623 Albertshieh           Discovered 1999 June 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Albert David Shieh (b. 1989) was awarded second place in the 2006 Intel International Science and Engineering Fair for his biochemistry project. He attends the Chaparral High School, Scottsdale, Arizona, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1999 LS24 = 1991 CT5 = 1995 GE7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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