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216941 (1999 TX20)
Classification: Main-belt Asteroid          SPK-ID: 2216941
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2082421831043833 4.0143e-08  
a 2.273753449614921 7.3541e-09 au
q 1.800262067425988 9.2976e-08 au
i 3.024690640599423 4.637e-06 deg
node 246.7255360839703 8.2377e-05 deg
peri 107.3787759020185 8.3227e-05 deg
M 82.6635029118071 1.1595e-05 deg
tp 2458912.942441659722
(2020-Mar-04.44244166)
3.9703e-05 TDB
period 1252.314713942686
3.43
6.0756e-06
1.663e-08
d
yr
n .2874676756504801 1.3946e-09 deg/d
Q 2.747244831803855 8.8855e-09 au
  Orbit Determination Parameters
   # obs. used (total)      320  
   data-arc span      10344 days (28.32 yr)  
   first obs. used      1992-09-23  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:53  

Additional Information
 Earth MOID = .796562 au 
 Jupiter MOID = 2.70567 au 
 T_jup = 3.580 
[ 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 17.35   n/a MPCxxxxx  

216941 (1999 TX20)          Discovered 1999-Oct-07 by Tucker, R. A. at Goodricke-Pigott
Reference: 20090806/Numbers.arcLast Updated: 2009-08-09

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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