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21540 Itthipanyanan (1998 QE11)
Classification: Main-belt Asteroid          SPK-ID: 2021540
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1087321812299103 1.1949e-07  
a 3.166283423782239 4.504e-08 au
q 2.822006520722288 3.9283e-07 au
i 22.05935001245231 1.3155e-05 deg
node 329.6544757906521 1.5828e-05 deg
peri 343.1439668554969 4.1558e-05 deg
M 36.36220126778672 3.7173e-05 deg
tp 2457192.640071577910
(2015-Jun-19.14007158)
0.00021401 JED
period 2057.894506464986
5.63
4.391e-05
1.202e-07
d
yr
n .1749360809648117 3.7326e-09 deg/d
Q 3.51056032684219 4.9937e-08 au
  Orbit Determination Parameters
   # obs. used (total)      622  
   data-arc span      12554 days (34.37 yr)  
   first obs. used      1981-08-05  
   last obs. used      2015-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48448  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:48:02  

Additional Information
 Earth MOID = 1.81265 au 
 Jupiter MOID = 1.84678 au 
 T_jup = 3.081 
[ 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 13.4 mag n/a MPO347689  
rotation period rot_per 15.2894 h n/a LCDB (Rev. 2015-December); 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.]

21540 Itthipanyanan           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Suksun Itthipanyanan (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for his botany team project. He attends the Triam Udom Suksa School, Bangkok, Thailand.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 QE11 = 1981 PV = 1999 UY10 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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