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

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07762276815920799 3.4352e-08  
a 2.947512536125199 1.4332e-08 au
q 2.718718453887194 9.9904e-08 au
i 2.392040738115553 4.177e-06 deg
node 41.63082121241324 8.6517e-05 deg
peri 323.8059991586937 9.0837e-05 deg
M 82.79773820667171 2.6812e-05 deg
tp 2458575.393357872285
(2019-Apr-01.89335787)
0.00013804 TDB
period 1848.340238280153
5.06
1.3481e-05
3.691e-08
d
yr
n .1947693355066346 1.4206e-09 deg/d
Q 3.176306618363205 1.5444e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1753  
   data-arc span      17846 days (48.86 yr)  
   first obs. used      1971-03-24  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5139  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:20:48  

Additional Information
 Earth MOID = 1.71727 au 
 Jupiter MOID = 2.22601 au 
 T_jup = 3.265 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7   n/a MPO452304  
diameter diameter 4.806 km 0.359 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.253   0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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