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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1207203714879821 3.675e-08  
a 2.616109107296612 1.6281e-08 AU
q 2.300291444010672 9.594e-08 AU
i 1.148212720685551 3.8695e-06 deg
node 274.825947381625 0.00032914 deg
peri 359.2080308154945 0.00032991 deg
M 295.2026182869538 2.9285e-05 deg
tp 2457078.687212438991
(2015-Feb-25.18721244)
0.000126 JED
period 1545.546962399457
4.23
1.4428e-05
3.95e-08
d
yr
n .2329272476076049 2.1745e-09 deg/d
Q 2.931926770582553 1.8247e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1050  
   data-arc span      14811 days (40.55 yr)  
   first obs. used      1973-09-19  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53221  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:56:17  

Additional Information
 Earth MOID = 1.28354 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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