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9259 Janvanparadijs (2189 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2009259
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1211507577752615 3.4339e-08  
a 2.616606320811288 1.4789e-08 au
q 2.299602482245461 8.9362e-08 au
i 1.148069219362018 3.8191e-06 deg
node 274.7997791095194 0.00028075 deg
peri 359.1208747355903 0.00028171 deg
M 121.5810476449631 2.5036e-05 deg
tp 2457078.381133314094
(2015-Feb-24.88113331)
0.00010762 JED
period 1545.987599611815
4.23
1.3107e-05
3.589e-08
d
yr
n .2328608587095996 1.9742e-09 deg/d
Q 2.933610159377115 1.6581e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1280  
   data-arc span      15447 days (42.29 yr)  
   first obs. used      1973-09-19  
   last obs. used      2016-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48762  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:33:41  

Additional Information
 Earth MOID = 1.28307 au 
 Jupiter MOID = 2.15559 au 
 T_jup = 3.396 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO253428  

9259 Janvanparadijs           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Jan van Paradijs (1946-1999), professor at the universities of Amsterdam and Alabama, was a pioneer researcher on issues of high-energy astrophysics. His recognition of the first optical counterpart to a \gamma -ray burst led to improved understanding of the physics of these events, their source environment and typical distances.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19991123/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Alternate Designations
 2189 T-2 = 1993 HJ6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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