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21162 (1993 TW16)
Classification: Main-belt Asteroid          SPK-ID: 2021162
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1547461050222747 3.5226e-08  
a 2.98952255743766 1.6552e-08 au
q 2.526905585797952 1.0323e-07 au
i 2.888597469776193 3.983e-06 deg
node 146.7344494820657 8.6199e-05 deg
peri 140.2738071546612 8.7494e-05 deg
M 169.146802030857 1.7184e-05 deg
tp 2458313.420650297351
(2018-Jul-13.92065030)
8.6784e-05 TDB
period 1887.996474415732
5.17
1.568e-05
4.293e-08
d
yr
n .1906783221676339 1.5836e-09 deg/d
Q 3.452139529077367 1.9113e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1157  
   data-arc span      10940 days (29.95 yr)  
   first obs. used      1991-02-22  
   last obs. used      2021-02-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54502  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:40:48  

Additional Information
 Earth MOID = 1.50946 au 
 Jupiter MOID = 1.71735 au 
 T_jup = 3.236 
[ 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 14.56   n/a E2021B10  
diameter diameter 6.391 km 0.280 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21162 (1993 TW16)          Discovered 1993-Oct-09 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1993 TW16 = 1997 LX14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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