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20007 Marybrown (1991 LR)
Classification: Main-belt Asteroid          SPK-ID: 2020007
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .23290207814162 7.3125e-08  
a 2.380162441037449 1.8069e-08 AU
q 1.825817662205196 1.8229e-07 AU
i 14.96340109001655 7.2525e-06 deg
node 116.0563574850396 2.6742e-05 deg
peri 188.920226229516 3.0473e-05 deg
M 56.95071622916144 1.7437e-05 deg
tp 2456588.319722539276
(2013-Oct-22.81972254)
6.3936e-05 JED
period 1341.245640853729
3.67
1.5273e-05
4.182e-08
d
yr
n .2684072097120502 3.0564e-09 deg/d
Q 2.934507219869702 2.2277e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      626  
   data-arc span      8056 days (22.06 yr)  
   first obs. used      1991-06-07  
   last obs. used      2013-06-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5438  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:35:32  

Additional Information
 Earth MOID = .81085 AU 
 T_jup = 3.457 
[ 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 14.2 mag n/a MPO266061  

20007 Marybrown           Discovered 1991 June 7 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Mary J. Brown (b. 1945) assisted in organizing the Palomar Observatory's 1.2-m Schmidt Oschin Telescope plate archive at the California Institute of Technology. This eight-month project was accomplished in 2002 by a dedicated group of eleven volunteers, of which Mary was a valuable member.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030318/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1991 LR = 1998 GJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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