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12326 Shirasaki (1992 SF)
Classification: Main-belt Asteroid          SPK-ID: 2012326
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1879192943192459 6.5076e-08  
a 2.262808654477412 1.367e-08 AU
q 1.837583248948534 1.4433e-07 AU
i 5.842085144981417 6.8299e-06 deg
node 3.015181582716295 6.2369e-05 deg
peri 17.25514762206179 6.5924e-05 deg
M 176.5608072914886 2.1848e-05 deg
tp 2456390.735721621168
(2013-Apr-08.23572162)
7.3029e-05 JED
period 1243.283509991979
3.40
1.1266e-05
3.084e-08
d
yr
n .2895558391201717 2.6239e-09 deg/d
Q 2.688034060006289 1.6239e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      761  
   data-arc span      14107 days (38.62 yr)  
   first obs. used      1975-10-03  
   last obs. used      2014-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54503  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:20:23  

Additional Information
 Earth MOID = .84057 AU 
 T_jup = 3.588 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5 mag n/a PDS3 (MPC 36693)  

12326 Shirasaki           Discovered 1992 Sept. 21 by K. Endate and K. Watanabe at Kitami.
Shuichi Shirasaki (b. 1958), an anesthesiologist in Sapporo city, was the finalist in the selection of a Japanese astronaut candidate by the National Space Development Agency of Japan in 1999.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080618/MPCPages.arcLast Updated: 2008-06-20

[ show close-approach data ]
Alternate Designations
 1992 SF = 1975 TH2 = 1994 EE9 = 1997 AX24 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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