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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .130777813943902 4.0044e-08  
a 2.90128343519505 1.4236e-08 au
q 2.521859929908588 1.1808e-07 au
i 13.81433848889686 4.972e-06 deg
node 51.63526910055447 1.6573e-05 deg
peri 31.80258259291336 2.6211e-05 deg
M 305.3307224567543 1.8767e-05 deg
tp 2458874.609759411102
(2020-Jan-26.10975941)
9.4571e-05 TDB
period 1805.026841811417
4.94
1.3286e-05
3.638e-08
d
yr
n .1994430175003523 1.468e-09 deg/d
Q 3.280706940481513 1.6098e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2542  
   data-arc span      11027 days (30.19 yr)  
   first obs. used      1989-09-28  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3987  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 03:10:05  

Additional Information
 Earth MOID = 1.54721 au 
 Jupiter MOID = 2.07382 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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