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12357 Toyako (1993 ST1)
Classification: Main-belt Asteroid          SPK-ID: 2012357
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0901313087960732 7.3858e-08  
a 3.133521742470401 2.8945e-08 au
q 2.851093326680592 2.3647e-07 au
i 11.24285186055058 8.3417e-06 deg
node 173.0636801866208 2.3899e-05 deg
peri 211.2356862252295 3.8123e-05 deg
M 32.71452557353063 2.924e-05 deg
tp 2457416.386505375109
(2016-Jan-28.88650538)
0.00016465 JED
period 2026.037575143334
5.55
2.8072e-05
7.686e-08
d
yr
n .1776867341537491 2.462e-09 deg/d
Q 3.415950158260209 3.1553e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1122  
   data-arc span      8119 days (22.23 yr)  
   first obs. used      1993-09-16  
   last obs. used      2015-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5411  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:20:34  

Additional Information
 Earth MOID = 1.85829 au 
 Jupiter MOID = 2.05544 au 
 T_jup = 3.177 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8 mag n/a MPO350900  
rotation period rot_per 8.3304 h n/a LCDB (Rev. 2016-February); 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. (2016) Astron. J. 150, A75.]

12357 Toyako           Discovered 1993 Sept. 16 by K. Endate and K. Watanabe at Kitami.
Lake Toya (Toyako) is part of Shikotsu-Toya National Park in Hokkaido.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080520/MPCPages.arcLast Updated: 2008-05-22

Alternate Designations
 1993 ST1 = 1998 QN10 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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