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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09052480755803785 7.74e-08  
a 3.134554174036357 4.1745e-08 AU
q 2.850799260651472 2.4096e-07 AU
i 11.24146208694229 8.4377e-06 deg
node 173.0661149112894 2.9554e-05 deg
peri 211.3582006680868 4.7556e-05 deg
M 286.0417983811568 4.2929e-05 deg
tp 2457416.933767903627
(2016-Jan-29.43376790)
0.00024591 JED
period 2027.038964764521
5.55
4.0493e-05
1.109e-07
d
yr
n .1775989540693515 3.5478e-09 deg/d
Q 3.418309087421243 4.5524e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      942  
   data-arc span      7951 days (21.77 yr)  
   first obs. used      1993-09-16  
   last obs. used      2015-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5435  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:09:26  

Additional Information
 Earth MOID = 1.85927 AU 
 T_jup = 3.176 
[ 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 12.7 mag n/a MPO267756  
rotation period rot_per 8.3304 h n/a LCDB (Rev. 2015-July); 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., in press.]

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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