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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2393036966875436 6.6093e-08  
a 2.326149923753448 1.4324e-08 au
q 1.7694936479498 1.5001e-07 au
i 11.59650956603131 4.727e-06 deg
node 33.36543490169126 2.2724e-05 deg
peri 331.7384076907056 2.4568e-05 deg
M 234.7031762193138 1.4811e-05 deg
tp 2459451.516615235497
(2021-Aug-25.01661524)
5.6022e-05 TDB
period 1295.85073735769
3.55
1.1969e-05
3.277e-08
d
yr
n .2778097736272153 2.566e-09 deg/d
Q 2.882806199557096 1.7751e-08 au
  Orbit Determination Parameters
   # obs. used (total)      774  
   data-arc span      13295 days (36.40 yr)  
   first obs. used      1982-11-09  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51606  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:07:06  

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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