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JPL Small-Body Database Browser
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11471 Toshihirabayashi (1981 EH48)
Classification: Main-belt Asteroid          SPK-ID: 2011471
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1411032548557667 3.3298e-08  
a 2.573834191726949 1.3648e-08 au
q 2.210657809815215 8.664e-08 au
i 6.278521355154524 6.4361e-06 deg
node 227.2185984577684 4.764e-05 deg
peri 236.1144841964679 5.5982e-05 deg
M 240.157675855618 2.8286e-05 deg
tp 2459502.584712111051
(2021-Oct-15.08471211)		 0.00011904 TDB
period 1508.235906224716
4.13		 1.1997e-05
3.285e-08		 d
yr
n .2386894507114078 1.8985e-09 deg/d
Q 2.937010573638683 1.5574e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1027  
   data-arc span      14109 days (38.63 yr)  
   first obs. used      1979-10-18  
   last obs. used      2018-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53399  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-03 17:05:57  

Additional Information
 Earth MOID = 1.23465 au 
 Jupiter MOID = 2.24083 au 
 T_jup = 3.406 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO473922  
diameter diameter 2.940 km 0.788 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.324   0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11471 Toshihirabayashi           Discovered 1981 Mar. 6 by S. J. Bus at Siding Spring.
Masatoshi Hirabayashi (b. 1983) is a postdoctoral researcher at Purdue University specializing in modeling structural stresses experienced by rotating asteroids and comet nuclei.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-03-12Last Updated: 2017-04-19
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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