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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1208348842903582 3.5174e-08  
a 2.616468241454948 1.5549e-08 AU
q 2.300307604249343 9.2518e-08 AU
i 1.148181456523835 3.9744e-06 deg
node 274.8261141642089 0.00029056 deg
peri 359.1786224801104 0.00029149 deg
M 341.8170708768534 2.6e-05 deg
tp 2457078.578771856653
(2015-Feb-25.07877186)
0.00011167 JED
period 1545.865227655401
4.23
1.378e-05
3.773e-08
d
yr
n .2328792921657268 2.0759e-09 deg/d
Q 2.932628878660554 1.7427e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1179  
   data-arc span      15314 days (41.93 yr)  
   first obs. used      1973-09-19  
   last obs. used      2015-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48903  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:27:19  

Additional Information
 Earth MOID = 1.28542 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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