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20172 (1996 XT16)
Classification: Main-belt Asteroid          SPK-ID: 2020172
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1565424287366918 2.7726e-08  
a 2.377353419411008 6.9021e-09 au
q 2.005196741170929 6.5655e-08 au
i 1.535558753334178 3.7496e-06 deg
node 250.9084389815411 0.00012888 deg
peri 220.8850736298725 0.00012973 deg
M 168.123186497851 1.4348e-05 deg
tp 2458575.234937584172
(2019-Apr-01.73493758)
5.2343e-05 TDB
period 1338.871973334716
3.67
5.8306e-06
1.596e-08
d
yr
n .2688830651248539 1.171e-09 deg/d
Q 2.749510097651086 7.9825e-09 au
  Orbit Determination Parameters
   # obs. used (total)      886  
   data-arc span      11154 days (30.54 yr)  
   first obs. used      1989-12-30  
   last obs. used      2020-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50488  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:14:32  

Additional Information
 Earth MOID = 1.02199 au 
 Jupiter MOID = 2.3562 au 
 T_jup = 3.523 
[ 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 15.96   n/a E2021B10  

20172 (1996 XT16)          Discovered 1996-Dec-04 by Spacewatch at Kitt Peak
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1996 XT16 = 1989 YW3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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