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21368 Shiodayama (1997 LE10)
Classification: Main-belt Asteroid          SPK-ID: 2021368
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05749451906434715 2.009e-08  
a 3.019007107195195 1.3142e-08 au
q 2.845430745515162 6.3217e-08 au
i 11.29131087017526 2.9086e-07 deg
node 138.8531014270106 4.3325e-06 deg
peri 347.2717137620441 1.3824e-05 deg
M 289.4192946307402 1.2328e-05 deg
tp 2459576.145441960289
(2021-Dec-27.64544196)
6.5916e-05 TDB
period 1915.996140846192
5.25
1.2511e-05
3.425e-08
d
yr
n .1878918189475096 1.2269e-09 deg/d
Q 3.192583468875229 1.3898e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2370  
   data-arc span      8678 days (23.76 yr)  
   first obs. used      1997-06-06  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44419  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:44:06  

Additional Information
 Earth MOID = 1.86117 au 
 Jupiter MOID = 1.83935 au 
 T_jup = 3.215 
[ 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 12.98   n/a E2021B10  
rotation period rot_per 9.233 h n/a LCDB (Rev. 2020-October); 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. 150, A75.]

21368 Shiodayama           Discovered 1997 June 6 by T. Okuni at Nanyo.
Shiodayama is a 406-m mountain located in the north of the discoverer's home town, Shirataka, Yamagata prefecture, Japan.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110517/MPCPages.arcLast Updated: 2011-06-24

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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