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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .232790457249694 7.3088e-08  
a 2.380243155049086 1.7861e-08 AU
q 1.826145262619755 1.8203e-07 AU
i 14.96332854774296 7.2524e-06 deg
node 116.0567243424732 2.6741e-05 deg
peri 188.9303740466608 3.0479e-05 deg
M 110.6324151213254 1.7717e-05 deg
tp 2456588.297798747664
(2013-Oct-22.79779875)
6.3966e-05 JED
period 1341.313866176615
3.67
1.5097e-05
4.133e-08
d
yr
n .268393557300777 3.0209e-09 deg/d
Q 2.934341047478417 2.2019e-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 = .813113 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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