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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1196172641337446 5.4556e-08  
a 2.248885078223789 1.3175e-08 AU
q 1.979879597815457 1.1791e-07 AU
i 2.17286338656522 5.8086e-06 deg
node 86.50084713008455 0.00017579 deg
peri 56.50161350314949 0.00017885 deg
M 124.8922342012454 3.3346e-05 deg
tp 2456573.151429923582
(2013-Oct-07.65142992)
0.00011295 JED
period 1231.825871411757
3.37
1.0825e-05
2.964e-08
d
yr
n .2922490981516853 2.5682e-09 deg/d
Q 2.517890558632121 1.4751e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      806  
   data-arc span      8908 days (24.39 yr)  
   first obs. used      1990-02-01  
   last obs. used      2014-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53167  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:22:28  

Additional Information
 Earth MOID = .993891 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 15.0 mag n/a MPO256963  

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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