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13438 Marthanalexander (1999 XD86)
Classification: Main-belt Asteroid          SPK-ID: 2013438
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1195848430496606 5.4058e-08  
a 2.248608367376359 1.2414e-08 au
q 1.979708888683504 1.1695e-07 au
i 2.172785481455966 4.8214e-06 deg
node 86.49424635719203 0.000165 deg
peri 56.66588286996846 0.00016756 deg
M 300.0594774208938 3.113e-05 deg
tp 2457805.562942382563
(2017-Feb-21.06294238)
0.00010746 JED
period 1231.598526027124
3.37
1.0199e-05
2.792e-08
d
yr
n .2923030455072756 2.4207e-09 deg/d
Q 2.517507846069215 1.3899e-08 au
  Orbit Determination Parameters
   # obs. used (total)      911  
   data-arc span      9464 days (25.91 yr)  
   first obs. used      1990-02-01  
   last obs. used      2015-12-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52545  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:55:00  

Additional Information
 Earth MOID = .992035 au 
 Jupiter MOID = 2.49233 au 
 T_jup = 3.618 
[ 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 15.1 mag n/a MPO347631  

13438 Marthanalexander           Discovered 1999 Dec. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Named in honor of Martha N. Alexander for mentoring a finalist in the 2001 Discovery Young Scientist Challenge (DYSC), a middle school science competition. Alexander is a teacher at the All Saints Episcopal School, Lubbock, Texas.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011002/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1999 XD86 = 1990 CK = 1990 DC7 = 1994 LP6 = 1995 SY42 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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