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20686 Thottumkara (1999 VX54)
Classification: Main-belt Asteroid          SPK-ID: 2020686
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1537403216961341 3.4237e-08  
a 2.341128391216703 6.4917e-09 au
q 1.981202559219094 7.9167e-08 au
i .776537201894506 3.6499e-06 deg
node 141.7725374062205 0.00023716 deg
peri 64.24065964856236 0.00023738 deg
M 102.3057885902721 1.1156e-05 deg
tp 2458628.678943056360
(2019-May-25.17894306)
4.0225e-05 TDB
period 1308.387163074351
3.58
5.4421e-06
1.49e-08
d
yr
n .2751479150514584 1.1444e-09 deg/d
Q 2.701054223214312 7.4898e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1853  
   data-arc span      9711 days (26.59 yr)  
   first obs. used      1994-04-06  
   last obs. used      2020-11-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50371  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:14:30  

Additional Information
 Earth MOID = .97708 au 
 Jupiter MOID = 2.25805 au 
 T_jup = 3.548 
[ 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 15.0   n/a MPO474037  
rotation period rot_per 15.182 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:
[Polishook, D.; Brosch, N. (2008) ACM 2008 poster.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

20686 Thottumkara           Discovered 1999 Nov. 4 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Arun Thottumkara (b. 1986) was awarded first place and Best in Category in the 2004 Intel International Science and Engineering Fair for his chemistry project. He attends the Macomb High School, Macomb, Illinois, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041226/MPCPages.arcLast Updated: 2004-12-25

[ show close-approach data ]
Alternate Designations
 1999 VX54 = 1998 MX26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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