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20211 Joycegates (1997 GK8)
Classification: Main-belt Asteroid          SPK-ID: 2020211
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1119086228188249 7.1144e-08  
a 3.104558194582699 3.1153e-08 au
q 2.757131362566052 2.2106e-07 au
i 1.361360572126602 8.3731e-06 deg
node 353.8160733189453 0.00021478 deg
peri 221.4407151776608 0.00021732 deg
M 150.4793043883425 3.7419e-05 deg
tp 2456565.334763516847
(2013-Sep-29.83476352)
0.00020256 JED
period 1998.012194142138
5.47
3.0074e-05
8.234e-08
d
yr
n .1801790805158568 2.712e-09 deg/d
Q 3.451985026599346 3.4639e-08 au
  Orbit Determination Parameters
   # obs. used (total)      748  
   data-arc span      9038 days (24.74 yr)  
   first obs. used      1991-03-13  
   last obs. used      2015-12-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5578  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:44:38  

Additional Information
 Earth MOID = 1.75007 au 
 Jupiter MOID = 1.52053 au 
 T_jup = 3.211 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4 mag n/a MPO358823  

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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