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JPL Small-Body Database Browser
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20007 Marybrown (1991 LR)
Classification: Main-belt Asteroid          SPK-ID: 2020007
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .231748634500985 4.3226e-08  
a 2.381206738116352 1.0121e-08 au
q 1.829365328093343 1.0183e-07 au
i 14.94787903827909 5.2226e-06 deg
node 115.9817218704514 1.5473e-05 deg
peri 189.2370202808855 1.7551e-05 deg
M 179.4126134526996 8.7629e-06 deg
tp 2457931.625633274145
(2017-Jun-27.12563327)
3.1932e-05 TDB
period 1342.12844563903
3.67
8.5565e-06
2.343e-08
d
yr
n .2682306609100983 1.7101e-09 deg/d
Q 2.933048148139361 1.2466e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1295  
   data-arc span      10108 days (27.67 yr)  
   first obs. used      1991-06-07  
   last obs. used      2019-02-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48699  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:34:45  

Additional Information
 Earth MOID = .814573 au 
 Jupiter MOID = 2.32231 au 
 T_jup = 3.457 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO431729  
diameter diameter 7.136 km 0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.070   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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