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6661 Ikemura (1993 BO)
Classification: Main-belt Asteroid          SPK-ID: 2006661
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1715352985079948 1.4477e-08  
a 2.37663705108212 6.3034e-09 au
q 1.968959905079588 3.4253e-08 au
i 2.696142198643857 1.0466e-06 deg
node 194.4985136356406 3.1538e-05 deg
peri 199.7673643668818 2.7152e-05 deg
M 293.6342402734451 7.8532e-06 deg
tp 2459447.208601548915
(2021-Aug-20.70860155)
2.9715e-05 TDB
period 1338.266855130597
3.66
5.3241e-06
1.458e-08
d
yr
n .2690046447910188 1.0702e-09 deg/d
Q 2.784314197084652 7.3846e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2474  
   data-arc span      17198 days (47.09 yr)  
   first obs. used      1973-08-29  
   last obs. used      2020-09-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49398  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 18:58:09  

Additional Information
 Earth MOID = .974451 au 
 Jupiter MOID = 2.64229 au 
 T_jup = 3.520 
[ 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 13.74   n/a E2021B10  
diameter diameter 11.282 km 0.204 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.045   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

6661 Ikemura           Discovered 1993 Jan. 17 by Y. Mizuno and T. Furuta at Kani.
Toshihiro Ikemura (b. 1952) is a Japanese communications technician and amateur astronomer. He was a codiscoverer of comet 76P/West-Kohoutek-Ikemura on 1975 Mar. 1. He has also endeavored to observe the planets photographically and independently made a map of Mars that is used by many observers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011101/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1993 BO = 1973 QT1 = 1975 EY3 = 1984 RG = 1984 SY2 = 1991 NK6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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