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JPL Small-Body Database Browser
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11898 Dedeyn (1991 GM9)
Classification: Outer Main-belt Asteroid          SPK-ID: 2011898
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .10696740618485 5.4369e-08  
a 3.226565469546164 1.9924e-08 au
q 2.881428130383208 1.792e-07 au
i 2.098132170149588 4.5666e-06 deg
node 129.30086845279 0.00012474 deg
peri 51.67565710160463 0.00012634 deg
M 321.5944982554888 2.2079e-05 deg
tp 2458826.339597926032
(2019-Dec-08.83959793)
0.00013037 TDB
period 2116.942926412642
5.80
1.9608e-05
5.368e-08
d
yr
n .1700565449868096 1.5752e-09 deg/d
Q 3.57170280870912 2.2055e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1465  
   data-arc span      25380 days (69.49 yr)  
   first obs. used      1949-11-25  
   last obs. used      2019-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51737  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 19:14:43  

Additional Information
 Earth MOID = 1.88549 au 
 Jupiter MOID = 1.38789 au 
 T_jup = 3.177 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2   n/a MPO452338  
diameter diameter 11.369 km 0.188 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.079   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11898 Dedeyn           Discovered 1991 Apr. 10 by E. W. Elst at the European Southern Observatory.
Peter Paul De Deyn (b. 1957) is head of the Laboratory of Neurochemistry and Behavior at the Born-Bunge Foundation of the University of Antwerp. During 1985-1986 he specialized in neuropsychiatry at the Ann Arbor Medical Center. He is currently involved with studies of human ethology and animal laboratory sciences.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1991 GM9 = 1973 AW = 1991 HQ = 1993 QU7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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