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4965 Takeda (1981 EP28)
Classification: Main-belt Asteroid          SPK-ID: 2004965
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05839800077956231 3.9171e-08  
a 2.918504763569088 1.4135e-08 au
q 2.748069920111024 1.128e-07 au
i .8963571343183124 3.7766e-06 deg
node 255.7151878040271 0.00027319 deg
peri 67.48277876787095 0.00027686 deg
M 175.2410450818587 4.8007e-05 deg
tp 2458114.013001749092
(2017-Dec-26.51300175)
0.00024126 TDB
period 1821.121982131824
4.99
1.323e-05
3.622e-08
d
yr
n .1976803330760855 1.4361e-09 deg/d
Q 3.088939607027152 1.4961e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1843  
   data-arc span      17924 days (49.07 yr)  
   first obs. used      1971-03-24  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52199  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:14:42  

Additional Information
 Earth MOID = 1.73569 au 
 Jupiter MOID = 2.10004 au 
 T_jup = 3.278 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9   n/a MPO384798  
diameter diameter 4.755 km 1.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 12.550 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.284   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4965 Takeda           Discovered 1981 Mar. 6 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Hiroshi Takeda (b. 1934), professor at the Chiba Institute of Technology in Narashino, has conducted seminal research on both lunar meteorites and primitive achondrites. These studies have contributed to our understanding of the melting and differentiation of small bodies in the solar system.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

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