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39523 (1989 ST2)
Classification: Main-belt Asteroid          SPK-ID: 2039523
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2393037108644528 6.585e-08  
a 2.326149925825464 1.4285e-08 au
q 1.769493616548359 1.495e-07 au
i 11.59651336189856 4.7264e-06 deg
node 33.36543007161297 2.2674e-05 deg
peri 331.7384210580413 2.4519e-05 deg
M 234.7031694047871 1.4798e-05 deg
tp 2459451.516640367581
(2021-Aug-25.01664037)
5.5968e-05 TDB
period 1295.850739089107
3.55
1.1937e-05
3.268e-08
d
yr
n .2778097732560272 2.5592e-09 deg/d
Q 2.882806235102569 1.7704e-08 au
  Orbit Determination Parameters
   # obs. used (total)      778  
   data-arc span      13595 days (37.22 yr)  
   first obs. used      1982-11-09  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51602  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:28:40  

Additional Information
 Earth MOID = .777977 au 
 Jupiter MOID = 2.5928 au 
 T_jup = 3.509 
[ 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 15.3   n/a MPO319561  
diameter diameter 4.723 km 0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.087   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39523 (1989 ST2)          Discovered 1989-Sep-26 by Elst, E. W. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 ST2 = 1982 VS7 = 2000 XL29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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