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20211 Joycegates (1997 GK8)
Classification: Main-belt Asteroid          SPK-ID: 2020211
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1148645593514947 3.792e-08  
a 3.102042259586983 1.6657e-08 au
q 2.745727542349809 1.1266e-07 au
i 1.362114658428995 4.3981e-06 deg
node 353.5629433036537 0.00014624 deg
peri 221.0770168954861 0.00014734 deg
M 115.3649004206027 1.8538e-05 deg
tp 2458560.999060845056
(2019-Mar-18.49906085)
0.00010229 TDB
period 1995.583901658408
5.46
1.6073e-05
4.401e-08
d
yr
n .1803983283793911 1.453e-09 deg/d
Q 3.458356976824156 1.857e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1288  
   data-arc span      10862 days (29.74 yr)  
   first obs. used      1991-03-13  
   last obs. used      2020-12-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52107  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:15:09  

Additional Information
 Earth MOID = 1.73831 au 
 Jupiter MOID = 1.51304 au 
 T_jup = 3.211 
[ 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 14.36   n/a E2021B10  
diameter diameter 7.527 km 0.326 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.065   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20211 Joycegates           Discovered 1997 Apr. 2 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Joyce Gates mentored a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors. She teaches at the West Lafayette Junior-Senior High School, West Lafayette, Indiana.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Alternate Designations
 1997 GK8 = 1999 TC11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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