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11897 Lemaire (1991 GC7)
Classification: Main-belt Asteroid          SPK-ID: 2011897
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1086293519244734 8.2376e-08  
a 2.267013550080758 1.2948e-08 AU
q 2.020749337331486 1.9082e-07 AU
i 5.180482446441739 7.9482e-06 deg
node 28.28884273268985 5.5243e-05 deg
peri 138.4294429833548 6.3894e-05 deg
M 307.5455135284386 3.1536e-05 deg
tp 2456982.160179784369
(2014-Nov-20.66017978)
0.00010953 JED
period 1246.750642727741
3.41
1.0681e-05
2.924e-08
d
yr
n .2887506030976355 2.4738e-09 deg/d
Q 2.513277762830031 1.4355e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      875  
   data-arc span      22316 days (61.10 yr)  
   first obs. used      1953-02-15  
   last obs. used      2014-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53338  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:01:17  

Additional Information
 Earth MOID = 1.03061 AU 
 T_jup = 3.602 
[ 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 14.6 mag n/a MPO279641  

11897 Lemaire           Discovered 1991 Apr. 8 by E. W. Elst at the European Southern Observatory.
Joseph F. Lemaire (b. 1939), head of the Fundamental Dynamics section at the Belgian Institute for Space Aeronomy, Uccle, is renowned for his research on radiation belts, the solar wind and planetary magnetic fields. With Konstantin Gringauz he published the book The Earth's Plasmasphere in 1998.
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

Alternate Designations
 1991 GC7 = 1977 CZ2 = 1984 DR2 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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