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20648 (1999 TF166)
Classification: Main-belt Asteroid          SPK-ID: 2020648
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03985510507335136 5.8993e-08  
a 3.188027008996869 2.2046e-08 au
q 3.060967857576617 1.8913e-07 au
i 15.22827177253361 5.9818e-06 deg
node 348.5964305889253 1.7012e-05 deg
peri 28.21497887975807 6.2365e-05 deg
M 262.2910625503658 5.9338e-05 deg
tp 2459764.804098775748
(2022-Jul-04.30409878)
0.00034398 TDB
period 2079.128899175536
5.69
2.1567e-05
5.905e-08
d
yr
n .1731494377971253 1.7961e-09 deg/d
Q 3.315086160417121 2.2925e-08 au
  Orbit Determination Parameters
   # obs. used (total)      914  
   data-arc span      9796 days (26.82 yr)  
   first obs. used      1993-08-20  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55502  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:01:35  

Additional Information
 Earth MOID = 2.06335 au 
 Jupiter MOID = 1.90036 au 
 T_jup = 3.141 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456793.5 (2014-May-16.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04067568403879979 5.8031e-08  
q 3.056156606875581 1.8488e-07 au
tp 2457706.472615850187
(2016-Nov-13.97261585)
0.00034125 TDB
node 348.6583395980327 1.7019e-05 deg
peri 31.61367887760677 6.2763e-05 deg
i 15.2281881950136 5.9819e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      914  
   data-arc span      9796 days (26.82 yr)  
   first obs. used      1993-08-20  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55502  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:01:35  

Additional Information
 Jupiter MOID = 1.90036 au 
 T_jup = 3.141 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.367588755673076E-15 -1.065454902696917E-14 -5.275375773002827E-12 4.601001233725808E-15 -1.039025032702266E-12 -1.857031987681517E-15
q -1.065454902696917E-14 3.418079356232488E-14 1.765572030243739E-11 -1.858187349997203E-14 3.422102749360822E-12 7.93803261518718E-15
tp -5.275375773002827E-12 1.765572030243739E-11 1.164493298724335E-7 -5.87167997795624E-11 2.061848343243272E-8 -2.962642853850162E-11
node 4.601001233725808E-15 -1.858187349997203E-14 -5.87167997795624E-11 2.896542445087373E-10 -2.895453487446082E-10 1.362561546534948E-11
peri -1.039025032702266E-12 3.422102749360822E-12 2.061848343243272E-8 -2.895453487446082E-10 3.939217784465557E-9 -1.839435324068529E-11
i -1.857031987681517E-15 7.93803261518718E-15 -2.962642853850162E-11 1.362561546534948E-11 -1.839435324068529E-11 3.578308146365476E-11

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 13.93   n/a E2021B10  
diameter diameter 9.669 km 0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.043   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20648 (1999 TF166)          Discovered 1999-Oct-10 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 TF166 = 1993 QL9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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