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13249 Marcallen (1998 MD38)
Classification: Main-belt Asteroid          SPK-ID: 2013249
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1682258788418615 5.9472e-08  
a 2.673552494123159 2.2009e-08 au
q 2.22379177616944 1.577e-07 au
i 14.04361279111927 7.5324e-06 deg
node 284.3050378518611 2.4059e-05 deg
peri 134.1901471288851 3.1787e-05 deg
M 312.8404901663864 1.9326e-05 deg
tp 2457809.669463342353
(2017-Feb-25.16946334)
8.6478e-05 JED
period 1596.730056544716
4.37
1.9717e-05
5.398e-08
d
yr
n .2254607774961229 2.7841e-09 deg/d
Q 3.123313212076879 2.5712e-08 au
  Orbit Determination Parameters
   # obs. used (total)      814  
   data-arc span      20152 days (55.17 yr)  
   first obs. used      1961-02-16  
   last obs. used      2016-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44697  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:16:02  

Additional Information
 Earth MOID = 1.25892 au 
 Jupiter MOID = 2.23205 au 
 T_jup = 3.317 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8 mag n/a MPO256962  
diameter diameter 20.55 km 1.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
geometric albedo albedo 0.0663   0.011 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6

13249 Marcallen           Discovered 1998 June 18 by the Lowell Observatory Near-Earth-Object Search at the Anderson Mesa Station of the Lowell Observatory.
Marc Allen (b. 1951) is a stellar and solar astronomer who has directed the Space Studies Board of the U.S. National Research Council (1991-1999) and is currently Assistant Associate Administrator for Strategic and International Planning at NASA. The name was suggested by L. A. McFadden, L. J. Lanzerotti and C. R. Canizares.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1998 MD38 = 1952 BA1 = 1961 DG 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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