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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1685964673995334 5.9703e-08  
a 2.672649328061138 2.1971e-08 AU
q 2.222050092752293 1.5825e-07 AU
i 14.04675375259413 7.5623e-06 deg
node 284.3090825328586 2.4132e-05 deg
peri 134.2581606065958 3.1897e-05 deg
M 177.4817479766762 1.8934e-05 deg
tp 2456213.703185251483
(2012-Oct-13.20318525)
8.2587e-05 JED
period 1595.92102590002
4.37
1.9679e-05
5.388e-08
d
yr
n .2255750717971636 2.7816e-09 deg/d
Q 3.123248563369982 2.5675e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      794  
   data-arc span      19491 days (53.36 yr)  
   first obs. used      1961-02-16  
   last obs. used      2014-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44805  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:30:06  

Additional Information
 Earth MOID = 1.25837 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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