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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 ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .119600663859937 5.4049e-08  
a 2.248895341893587 1.2416e-08 au
q 1.979925966051594 1.1694e-07 au
i 2.172727231778201 4.8268e-06 deg
node 86.49626478292585 0.00016501 deg
peri 56.60081093522952 0.00016757 deg
M 241.6714166286112 3.087e-05 deg
tp 2457805.392244934500
(2017-Feb-20.89224493)
0.0001075 JED
period 1231.834304302709
3.37
1.0201e-05
2.793e-08
d
yr
n .2922470974728871 2.4201e-09 deg/d
Q 2.51786471773558 1.39e-08 au
  Orbit Determination Parameters
   # obs. used (total)      909  
   data-arc span      9435 days (25.83 yr)  
   first obs. used      1990-02-01  
   last obs. used      2015-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52392  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:24:07  

Additional Information
 Earth MOID = .993556 au 
 Jupiter MOID = 2.49249 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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