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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06768781668181693 3.3122e-08  
a 2.392676185790277 8.3838e-09 au
q 2.230721158747556 8.0178e-08 au
i 6.415540259512529 3.7583e-06 deg
node 119.5456949826872 3.2782e-05 deg
peri 84.09177103000303 4.3071e-05 deg
M 329.5610191463285 2.8083e-05 deg
tp 2459114.801498538448
(2020-Sep-22.30149854)
0.00010549 TDB
period 1351.836964307496
3.70
7.1051e-06
1.945e-08
d
yr
n .2663043025934838 1.3997e-09 deg/d
Q 2.554631212832998 8.9513e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2198  
   data-arc span      15993 days (43.79 yr)  
   first obs. used      1976-04-23  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45895  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:22:58  

Additional Information
 Earth MOID = 1.23806 au 
 Jupiter MOID = 2.42153 au 
 T_jup = 3.519 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456704.5 (2014-Feb-16.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06800864798771719 3.3068e-08  
q 2.230273291326786 8.0091e-08 au
tp 2456412.442888935501
(2013-Apr-29.94288894)
0.00010526 TDB
node 119.5890665161724 3.2768e-05 deg
peri 84.50066444261701 4.2999e-05 deg
i 6.416505363927065 3.7591e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2198  
   data-arc span      15993 days (43.79 yr)  
   first obs. used      1976-04-23  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45895  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:22:58  

Additional Information
 Jupiter MOID = 2.42153 au 
 T_jup = 3.519 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.0935013536728E-15 -2.635970483923977E-15 -1.291671085434917E-13 -7.407520785406977E-15 -2.442121476077801E-14 -3.495434785995607E-16
q -2.635970483923977E-15 6.414612153533946E-15 2.462630015169448E-13 1.797097018817376E-14 4.383569290904114E-14 9.657801370253752E-16
tp -1.291671085434917E-13 2.462630015169448E-13 1.107920280401974E-8 2.017899511661225E-11 2.944110637446561E-9 -2.636501196731471E-12
node -7.407520785406977E-15 1.797097018817376E-14 2.017899511661225E-11 1.073765531711627E-9 -1.061021237568901E-9 1.806387351893916E-13
peri -2.442121476077801E-14 4.383569290904114E-14 2.944110637446561E-9 -1.061021237568901E-9 1.848876916662128E-9 -8.559961768212945E-13
i -3.495434785995607E-16 9.657801370253752E-16 -2.636501196731471E-12 1.806387351893916E-13 -8.559961768212945E-13 1.413091842228913E-11

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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