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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2321742016778694 3.6575e-08  
a 2.381090385908584 8.9237e-09 au
q 1.828262626437409 8.7862e-08 au
i 14.94890376424929 4.2993e-06 deg
node 115.9843941037142 1.4915e-05 deg
peri 189.2513344151712 1.6779e-05 deg
M 340.3810379625048 8.9865e-06 deg
tp 2459273.636769805141
(2021-Feb-28.13676981)
3.3655e-05 TDB
period 1342.030076796681
3.67
7.5443e-06
2.066e-08
d
yr
n .2682503218253433 1.508e-09 deg/d
Q 2.93391814537976 1.0996e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1629  
   data-arc span      10658 days (29.18 yr)  
   first obs. used      1991-06-07  
   last obs. used      2020-08-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46018  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:11:17  

Additional Information
 Earth MOID = .812252 au 
 Jupiter MOID = 2.32359 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 14.37   n/a E2021B10  
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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