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4731 Monicagrady (1981 EE9)
Classification: Main-belt Asteroid          SPK-ID: 2004731
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2788714995324215 3.1912e-08  
a 3.109852630831312 1.466e-08 au
q 2.242603364346538 1.0027e-07 au
i 5.851300612486396 3.5349e-06 deg
node 282.1147472696471 4.5413e-05 deg
peri 139.3795377011125 4.6056e-05 deg
M 166.6934601287336 9.0554e-06 deg
tp 2458272.978038450490
(2018-Jun-03.47803845)
4.6534e-05 TDB
period 2003.125412958337
5.48
1.4165e-05
3.878e-08
d
yr
n .1797191517171809 1.2708e-09 deg/d
Q 3.977101897316086 1.8749e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1449  
   data-arc span      14818 days (40.57 yr)  
   first obs. used      1979-11-22  
   last obs. used      2020-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48171  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:41:56  

Additional Information
 Earth MOID = 1.25896 au 
 Jupiter MOID = 1.40427 au 
 T_jup = 3.150 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.92   n/a MPCxxxxx  
diameter diameter 10.117 km 0.513 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4731 Monicagrady           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Monica Grady (b. 1958), curator of the meteorite collection at the Natural History Museum in London, studies carbon isotopes in a wide range of meteorites with a focus on understanding the geologic processes leading to their formation. She is also actively involved in meteorite recovery efforts around the world.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

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