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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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1411032826778505 3.102e-08  
a 2.573834185254274 1.0798e-08 au
q 2.210657732646425 8.2774e-08 au
i 6.278528898109325 5.2282e-06 deg
node 227.2186218945954 4.5392e-05 deg
peri 236.1144796862854 5.2014e-05 deg
M 240.1576649375677 2.6206e-05 deg
tp 2459502.584755958742
(2021-Oct-15.08475596)
0.00011102 TDB
period 1508.235900535352
4.13
9.491e-06
2.598e-08
d
yr
n .2386894516117918 1.502e-09 deg/d
Q 2.937010637862123 1.2321e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1352  
   data-arc span      15003 days (41.08 yr)  
   first obs. used      1979-10-18  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50526  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:46:06  

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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