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20621 (1999 TK11)
Classification: Main-belt Asteroid          SPK-ID: 2020621
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08359761182225789 2.6559e-08  
a 2.435244839873162 7.9228e-09 au
q 2.231664187057289 6.4153e-08 au
i 6.355348522055881 5.1933e-06 deg
node 356.8159613723997 2.3887e-05 deg
peri 105.3213823053223 4.336e-05 deg
M 83.22547920840843 3.4366e-05 deg
tp 2458679.602614840139
(2019-Jul-15.10261484)
0.00013261 TDB
period 1388.073216956359
3.80
6.7739e-06
1.855e-08
d
yr
n .2593523134099334 1.2657e-09 deg/d
Q 2.638825492689035 8.5852e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2301  
   data-arc span      13041 days (35.70 yr)  
   first obs. used      1984-10-30  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41964  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:01:42  

Additional Information
 Earth MOID = 1.25844 au 
 Jupiter MOID = 2.45484 au 
 T_jup = 3.492 
[ 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 13.6   n/a MPO416927  
diameter diameter 4.362 km 0.151 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.370   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20621 (1999 TK11)          Discovered 1999-Oct-09 by Nomen, J. at Ametlla de Mar
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TK11 = 1984 UJ5 = 1997 BS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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