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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06768782944090711 3.5073e-08  
a 2.392676188873783 8.8212e-09 au
q 2.230721131093974 8.3998e-08 au
i 6.41554026260908 3.7733e-06 deg
node 119.5456945463272 3.4817e-05 deg
peri 84.09177446690609 4.4674e-05 deg
M 329.5610141334145 2.8447e-05 deg
tp 2459114.801517583410
(2020-Sep-22.30151758)
0.00010689 TDB
period 1351.836966920719
3.70
7.4759e-06
2.047e-08
d
yr
n .2663043020786935 1.4727e-09 deg/d
Q 2.554631246653591 9.4183e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2119  
   data-arc span      15964 days (43.71 yr)  
   first obs. used      1976-04-23  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46648  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 19:44:08  

Additional Information
 Earth MOID = 1.23806 au 
 Jupiter MOID = 2.42153 au 
 T_jup = 3.519 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456608.5 (2013-Nov-12.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06794744431262836 3.5023e-08  
q 2.230376230930466 8.3916e-08 au
tp 2456412.448372071999
(2013-Apr-29.94837207)
0.00010606 TDB
node 119.5897024704715 3.4804e-05 deg
peri 84.50643125317529 4.4612e-05 deg
i 6.416355902857705 3.774e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2119  
   data-arc span      15964 days (43.71 yr)  
   first obs. used      1976-04-23  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46648  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 19:44:08  

Additional Information
 Jupiter MOID = 2.42153 au 
 T_jup = 3.519 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.226613816678358E-15 -2.92496469380846E-15 1.270287543708102E-14 -9.973084534319552E-15 8.52822460124224E-15 -3.647104448998468E-16
q -2.92496469380846E-15 7.041830247243902E-15 -6.282703110778771E-14 2.385318052556716E-14 -2.823712897830666E-14 9.872377808075633E-16
tp 1.270287543708102E-14 -6.282703110778771E-14 1.124880901731463E-8 2.486339939583269E-11 2.976838822341481E-9 -2.873128045361305E-12
node -9.973084534319552E-15 2.385318052556716E-14 2.486339939583269E-11 1.211302563740525E-9 -1.196292975615575E-9 -3.751397979498069E-12
peri 8.52822460124224E-15 -2.823712897830666E-14 2.976838822341481E-9 -1.196292975615575E-9 1.990205113378799E-9 2.988677913697128E-12
i -3.647104448998468E-16 9.872377808075633E-16 -2.873128045361305E-12 -3.751397979498069E-12 2.988677913697128E-12 1.424337549596118E-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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