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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2317978735510701 5.8695e-08  
a 2.382157269668238 1.4892e-08 au
q 1.829978280094917 1.4436e-07 au
i 14.95279630496599 6.818e-06 deg
node 116.0473284471165 2.3636e-05 deg
peri 189.0095320865206 2.7644e-05 deg
M 217.8389162593541 1.8055e-05 deg
tp 2457930.813028621773
(2017-Jun-26.31302862)
7.026e-05 JED
period 1342.932153303877
3.68
1.2593e-05
3.448e-08
d
yr
n .2680701322954621 2.5138e-09 deg/d
Q 2.934336259241558 1.8345e-08 au
  Orbit Determination Parameters
   # obs. used (total)      744  
   data-arc span      8960 days (24.53 yr)  
   first obs. used      1991-06-07  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52822  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:44:07  

Additional Information
 Earth MOID = .814008 au 
 Jupiter MOID = 2.31164 au 
 T_jup = 3.456 
[ 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 14.3 mag n/a MPO333004  

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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