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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1010607285746641 3.4398e-08  
a 2.918206376718731 1.4467e-08 au
q 2.623290314156305 9.8705e-08 au
i 2.561733766863789 3.4849e-06 deg
node 148.9664694619443 8.9736e-05 deg
peri 189.4392039934677 9.2073e-05 deg
M 143.0064827572449 2.1626e-05 deg
tp 2458477.188026078321
(2018-Dec-24.68802608)
0.00010916 TDB
period 1820.842703011046
4.99
1.3541e-05
3.707e-08
d
yr
n .197710653097428 1.4703e-09 deg/d
Q 3.213122439281156 1.5929e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1746  
   data-arc span      10052 days (27.52 yr)  
   first obs. used      1993-07-12  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53499  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:55:29  

Additional Information
 Earth MOID = 1.61228 au 
 Jupiter MOID = 2.13149 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 14.02   n/a E2021B10  
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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