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18403 Atsuhirotaisei (1993 AG)
Classification: Main-belt Asteroid          SPK-ID: 2018403
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3102437660975226 3.3011e-08  
a 2.635312061333173 1.0191e-08 au
q 1.817722922582944 8.5023e-08 au
i 3.661496769357678 5.1251e-06 deg
node 174.062469921798 6.4236e-05 deg
peri 312.0380001547807 6.5093e-05 deg
M 187.9881850532589 1.1546e-05 deg
tp 2459947.124572211983
(2023-Jan-02.62457221)
5.2584e-05 TDB
period 1562.595255910392
4.28
9.0644e-06
2.482e-08
d
yr
n .2303859548007257 1.3364e-09 deg/d
Q 3.452901200083402 1.3353e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1219  
   data-arc span      14821 days (40.58 yr)  
   first obs. used      1979-12-18  
   last obs. used      2020-07-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54129  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:28:36  

Additional Information
 Earth MOID = .835302 au 
 Jupiter MOID = 1.64308 au 
 T_jup = 3.325 
[ 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 14.83   n/a E2021B10  
diameter diameter 2.736 km 0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.314   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18403 Atsuhirotaisei           Discovered 1993 Jan. 13 by K. Endate and K. Watanabe at Kitami.
Atsuhiro Ikuta (1999-2011) and Taisei Ikuta (2003-2011) were two brothers who loved the stars. They died in an automobile accident on the night of 2011 December 10, on their return home from viewing a total lunar eclipse.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120831/MPCPages.arcLast Updated: 2012-09-04

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Alternate Designations
 1993 AG = 1979 YG4 = 2000 SB109 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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