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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 ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1011577801028427 3.4394e-08  
a 2.918046596503443 1.3952e-08 au
q 2.622863480564499 9.8531e-08 au
i 2.562018019084909 3.4809e-06 deg
node 148.9657140413079 8.3559e-05 deg
peri 189.4997681672201 8.5812e-05 deg
M 181.6836171505976 2.0973e-05 deg
tp 2460298.331718484392
(2023-Dec-19.83171848)
0.00010727 TDB
period 1820.693160474062
4.98
1.3058e-05
3.575e-08
d
yr
n .1977268920515224 1.4181e-09 deg/d
Q 3.213229712442387 1.5363e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1868  
   data-arc span      10161 days (27.82 yr)  
   first obs. used      1993-07-12  
   last obs. used      2021-05-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52474  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:38:37  

Additional Information
 Earth MOID = 1.61296 au 
 Jupiter MOID = 2.13097 au 
 T_jup = 3.272 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.06   n/a MPCxxxxx  
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

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