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21159 (1993 ST5)
Classification: Main-belt Asteroid          SPK-ID: 2021159
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1500304750733855 2.397e-08  
a 2.131423980073976 6.6062e-09 au
q 1.811645427760672 5.1002e-08 au
i 1.610779062340228 4.0979e-06 deg
node 193.7973592965063 9.4948e-05 deg
peri 95.0764594729946 9.7092e-05 deg
M 329.7376533811479 2.4288e-05 deg
tp 2459296.043973487944
(2021-Mar-22.54397349)
7.6954e-05 TDB
period 1136.588344878479
3.11
5.2842e-06
1.447e-08
d
yr
n .3167373672466174 1.4726e-09 deg/d
Q 2.451202532387281 7.5974e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1959  
   data-arc span      17813 days (48.77 yr)  
   first obs. used      1971-08-19  
   last obs. used      2020-05-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47796  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:40:40  

Additional Information
 Earth MOID = .794275 au 
 Jupiter MOID = 2.69515 au 
 T_jup = 3.706 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.05   n/a E2021B10  
diameter diameter 2.464 km 0.548 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.350   0.209 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21159 (1993 ST5)          Discovered 1993-Sep-17 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 ST5 = 1971 QW2 = 1990 UT13 = 1999 NZ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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