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39525 (1989 TR2)
Classification: Main-belt Asteroid          SPK-ID: 2039525
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1309239563038813 4.0026e-08  
a 2.901951418446825 1.3411e-08 au
q 2.522016457742107 1.1783e-07 au
i 13.81247209499813 4.8232e-06 deg
node 51.63291807419542 1.5634e-05 deg
peri 31.69020616111894 2.5197e-05 deg
M 25.18742363797457 1.7738e-05 deg
tp 2458874.167561413428
(2020-Jan-25.66756141)
8.8837e-05 TDB
period 1805.650254065563
4.94
1.2517e-05
3.427e-08
d
yr
n .1993741585278942 1.3821e-09 deg/d
Q 3.281886379151544 1.5167e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2679  
   data-arc span      11084 days (30.35 yr)  
   first obs. used      1989-09-28  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39191  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:28:40  

Additional Information
 Earth MOID = 1.54744 au 
 Jupiter MOID = 2.07291 au 
 T_jup = 3.231 
[ 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 12.3   n/a MPO319561  
diameter diameter 9.313 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.223   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

39525 (1989 TR2)          Discovered 1989-Oct-03 by Bus, S. J. at Cerro Tololo
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1989 TR2 = 1999 UO2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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