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11243 de Graauw (2157 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2011243
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1176715192879993 5.5265e-08  
a 2.780961004556119 2.3736e-08 AU
q 2.45372109806932 1.5116e-07 AU
i 3.693440392446014 5.6328e-06 deg
node 163.2107512825548 8.8396e-05 deg
peri 246.3808197474217 9.284e-05 deg
M 147.0164024348927 2.6632e-05 deg
tp 2455708.742198222261
(2011-May-27.24219822)		 0.00012222 JED
period 1693.911730361325
4.64		 2.1687e-05
5.938e-08		 d
yr
n .2125258321005955 2.7209e-09 deg/d
Q 3.108200911042919 2.6529e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      1134  
   data-arc span      15369 days (42.08 yr)  
   first obs. used      1971-03-24  
   last obs. used      2013-04-21  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .5357  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:43:46  

Additional Information
 Earth MOID = 1.46598 AU 
 T_jup = 3.320 
[ 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 13.4 mag n/a PDS3 (MPC 35274)  

11243 de Graauw           Discovered 1971 Mar. 25 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Dutch astronomer Matthijs W. M. de Graauw (b. 1942) is known for his tireless enthusiasm in pushing Dutch and European infrared and submillimeter astronomy forward, both on the ground and in space.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070730/MPCPages.arcLast Updated: 2007-08-07

Alternate Designations
 2157 T-1 = 1987 SQ28 = 1999 FE35 = 4623 T-1 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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