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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1398966184230314 3.3136e-08  
a 2.576652084061108 1.3512e-08 au
q 2.216187170648302 8.6063e-08 au
i 6.283088378544055 6.4405e-06 deg
node 227.2953384375666 4.7533e-05 deg
peri 235.6518156068558 5.6132e-05 deg
M 145.2426790988535 2.8617e-05 deg
tp 2457990.999804531240
(2017-Aug-25.49980453)		 0.00011968 TDB
period 1510.713460603506
4.14		 1.1883e-05
3.253e-08		 d
yr
n .2382980024922699 1.8744e-09 deg/d
Q 2.937116997473912 1.5402e-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 = 1.24022 au 
 Jupiter MOID = 2.24283 au 
 T_jup = 3.405 
[ 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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