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9504 Lionel (2224 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2009504
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07691519209424419 5.141e-08  
a 2.945909214348439 2.2827e-08 AU
q 2.719324041234625 1.4689e-07 AU
i 2.392922919184679 6.1882e-06 deg
node 41.69480599171359 0.00013241 deg
peri 320.6871474837506 0.00013909 deg
M 56.51638760646061 4.2366e-05 deg
tp 2456710.565858389646
(2014-Feb-22.06585839)
0.00021787 JED
period 1846.83231537247
5.06
2.1466e-05
5.877e-08
d
yr
n .1949283630156727 2.2657e-09 deg/d
Q 3.172494387462253 2.4583e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1106  
   data-arc span      16060 days (43.97 yr)  
   first obs. used      1971-03-24  
   last obs. used      2015-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52239  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:35:15  

Additional Information
 Earth MOID = 1.7172 AU 
 T_jup = 3.265 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6 mag n/a MPO270236  

9504 Lionel           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Lionel was one of the knights of the Round Table.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 2224 T-2 = 1978 RC2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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