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21990 Garretyazzie (1999 XH22)
Classification: Main-belt Asteroid          SPK-ID: 2021990
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1009993309687053 3.447e-08  
a 2.917952214363992 1.528e-08 au
q 2.623240992914577 9.9226e-08 au
i 2.5615156730218 3.5233e-06 deg
node 148.9709020228005 9.6765e-05 deg
peri 189.3536347487462 9.9288e-05 deg
M 103.5595970003463 2.2687e-05 deg
tp 2458476.774715976177
(2018-Dec-24.27471598)
0.00011501 TDB
period 1820.604827652484
4.98
1.43e-05
3.915e-08
d
yr
n .1977364854426919 1.5531e-09 deg/d
Q 3.212663435813407 1.6823e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1680  
   data-arc span      9700 days (26.56 yr)  
   first obs. used      1993-07-12  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53549  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:34:15  

Additional Information
 Earth MOID = 1.61409 au 
 Jupiter MOID = 2.13186 au 
 T_jup = 3.272 
[ 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 MPO358838  
diameter diameter 4.772 km 0.100 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.234   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21990 Garretyazzie           Discovered 1999 Dec. 6 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Garrett Michael Yazzie (b. 1991) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his engineering project. He attends the Pinon Unified School District #4 Middle School, Pinon, Arizona.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051019/MPCPages.arcLast Updated: 2005-10-26

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Alternate Designations
 1999 XH22 = 1993 OB12 = 1998 MU29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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