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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2314760569769742 5.5763e-08  
a 2.381990599761012 1.4909e-08 au
q 1.830616807972115 1.3764e-07 au
i 14.94529941438761 6.0997e-06 deg
node 116.0097799640688 2.1354e-05 deg
peri 189.1056551726084 2.5148e-05 deg
M 271.3441299732737 1.7727e-05 deg
tp 2457931.184232113232
(2017-Jun-26.68423211)
6.8067e-05 JED
period 1342.79121647417
3.68
1.2607e-05
3.452e-08
d
yr
n .268098268430195 2.517e-09 deg/d
Q 2.933364391549909 1.836e-08 au
  Orbit Determination Parameters
   # obs. used (total)      873  
   data-arc span      9074 days (24.84 yr)  
   first obs. used      1991-06-07  
   last obs. used      2016-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52305  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:33:48  

Additional Information
 Earth MOID = .816154 au 
 Jupiter MOID = 2.31393 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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