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JPL Small-Body Database Browser
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20656 (1999 TX258)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020656
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1396926188811731 4.3828e-08  
a 3.207683585705601 2.7995e-08 au
q 2.759593865076234 1.4998e-07 au
i 2.027681928092185 4.843e-06 deg
node 41.6344573766792 0.00014368 deg
peri 216.083403879007 0.0001457 deg
M 246.1461467071791 2.9747e-05 deg
tp 2459264.137536229328
(2021-Feb-18.63753623)		 0.00017924 TDB
period 2098.387591925468
5.75		 2.747e-05
7.521e-08		 d
yr
n .1715602977187194 2.2459e-09 deg/d
Q 3.655773306334968 3.1906e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1023  
   data-arc span      9323 days (25.52 yr)  
   first obs. used      1993-09-15  
   last obs. used      2019-03-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57566  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:43:42  

Additional Information
 Earth MOID = 1.74456 au 
 Jupiter MOID = 1.4049 au 
 T_jup = 3.176 
[ 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 14.1   n/a MPO302191  
diameter diameter 7.881 km 0.318 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.071   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20656 (1999 TX258)          Discovered 1999-Oct-09 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 TX258 = 1996 BD15 = 1997 EU47 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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