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66661 Wallin (1999 TK2)
Classification: Main-belt Asteroid          SPK-ID: 2066661
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1779239295253834 5.9812e-08  
a 3.115282437966521 2.6991e-08 au
q 2.560999145022101 1.8752e-07 au
i 28.22686045413577 8.9248e-06 deg
node 341.963517693182 9.6348e-06 deg
peri 229.9474150084146 2.44e-05 deg
M 83.54408027575228 2.1681e-05 deg
tp 2458734.422917618544
(2019-Sep-07.92291762)
0.00012146 TDB
period 2008.373892004201
5.50
2.6101e-05
7.146e-08
d
yr
n .1792494920558581 2.3295e-09 deg/d
Q 3.669565730910941 3.1793e-08 au
  Orbit Determination Parameters
   # obs. used (total)      702  
   data-arc span      11229 days (30.74 yr)  
   first obs. used      1989-10-01  
   last obs. used      2020-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55296  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 12:24:03  

Additional Information
 Earth MOID = 1.63049 au 
 Jupiter MOID = 1.53875 au 
 T_jup = 3.012 
[ 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 14.22   n/a E2021B10  

66661 Wallin           Discovered 1999 Oct. 2 by D. S. Dixon at Jornada Observatory.
John F. Wallin (b. 1961) is an astrophysicist at George Mason University, Virginia. He is an educator and researcher of stellar formation, galactic dynamics and the presence and effects of non-baryonic matter in the solar system.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20051215/MPCPages.arcLast Updated: 2006-03-22

[ show close-approach data ]
Alternate Designations
 1999 TK2 = 2002 DB8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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