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JPL Small-Body Database Browser
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4830 Thomascooley (1988 RG4)
Classification: Main-belt Asteroid          SPK-ID: 2004830
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06789174781421851 3.6313e-08  
a 2.393054877347472 9.0339e-09 au
q 2.230586199109012 8.6505e-08 au
i 6.414983707606561 3.7737e-06 deg
node 119.5469804945415 3.5918e-05 deg
peri 83.96298536074912 4.5523e-05 deg
M 223.202070786508 2.8473e-05 deg
tp 2459114.312228753464
(2020-Sep-21.81222875)
0.0001073 TDB
period 1352.157912146258
3.70
7.6567e-06
2.096e-08
d
yr
n .2662410926757643 1.5076e-09 deg/d
Q 2.555523555585932 9.6473e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2079  
   data-arc span      15930 days (43.61 yr)  
   first obs. used      1976-04-23  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46846  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:50:03  

Additional Information
 Earth MOID = 1.23821 au 
 Jupiter MOID = 2.42174 au 
 T_jup = 3.519 
[ 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 13.2   n/a MPO502199  
diameter diameter 5.742 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.371   0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4830 Thomascooley           Discovered 1988 Sept. 1 by H. Debehogne at the European Southern Observatory.
Thomas Benton Cooley (1871--1945) was an American hematologist and professor of hygiene and medicine at the University of Michigan and Wayne State University. He is remembered for his discovery of a form of childhood anemia that became known as Cooley's anemia, a severe form of thalassemia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-10-08Last Updated: 2015-01-12

Alternate Designations
 1988 RG4 = 1976 HE = 1983 CU = 1985 VW4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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