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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2320269551702015 3.691e-08  
a 2.380642150568554 9.0436e-09 au
q 1.828269001022292 8.8619e-08 au
i 14.9488965573072 4.327e-06 deg
node 115.9846069161512 1.5218e-05 deg
peri 189.27443044 1.7109e-05 deg
M 286.692249257996 8.932e-06 deg
tp 2459273.703965493353
(2021-Feb-28.20396549)
3.384e-05 TDB
period 1341.651143052359
3.67
7.645e-06
2.093e-08
d
yr
n .2683260860054666 1.529e-09 deg/d
Q 2.933015300114815 1.1142e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1592  
   data-arc span      10603 days (29.03 yr)  
   first obs. used      1991-06-07  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45901  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:38:26  

Additional Information
 Earth MOID = .814255 au 
 Jupiter MOID = 2.32487 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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