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20629 (1999 TB90)
Classification: Main-belt Asteroid          SPK-ID: 2020629
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1917522681582912 3.5388e-08  
a 3.042437792722505 1.6209e-08 au
q 2.45904344523746 1.1316e-07 au
i 11.16000241194828 4.8617e-06 deg
node 178.1294837899687 1.7143e-05 deg
peri 285.455808181559 2.1022e-05 deg
M 279.8157214534702 1.148e-05 deg
tp 2459632.235452631233
(2022-Feb-21.73545263)
6.2517e-05 TDB
period 1938.344595281895
5.31
1.549e-05
4.241e-08
d
yr
n .1857254901302237 1.4842e-09 deg/d
Q 3.62583214020755 1.9317e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1287  
   data-arc span      11873 days (32.51 yr)  
   first obs. used      1988-08-10  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52154  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:25:28  

Additional Information
 Earth MOID = 1.50384 au 
 Jupiter MOID = 1.67353 au 
 T_jup = 3.183 
[ 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 14.12   n/a E2021B10  
diameter diameter 5.705 km 0.227 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.136   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20629 (1999 TB90)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TB90 = 1988 PS2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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