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18237 Kenfreeman (1182 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2018237
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1534609518396849 2.8703e-08  
a 2.46033337548769 9.7571e-09 au
q 2.082768273842404 7.0368e-08 au
i 2.490438116676268 3.6576e-06 deg
node 169.2053424290677 7.7133e-05 deg
peri 67.93763617994392 7.8464e-05 deg
M 200.0386313929315 1.6208e-05 deg
tp 2459826.828212202650
(2022-Sep-04.32821220)
6.486e-05 TDB
period 1409.57881491263
3.86
8.3851e-06
2.296e-08
d
yr
n .2553954388299414 1.5193e-09 deg/d
Q 2.837898477132976 1.1254e-08 au
  Orbit Determination Parameters
   # obs. used (total)      922  
   data-arc span      17312 days (47.40 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52423  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:34  

Additional Information
 Earth MOID = 1.07117 au 
 Jupiter MOID = 2.16236 au 
 T_jup = 3.473 
[ 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 15.51   n/a MPCxxxxx  
diameter diameter 2.216 km 0.325 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.249   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18237 Kenfreeman           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Kenneth C. Freeman (b. 1940), professor at the Australian National University, is well known for his studies of the formation, structure and dynamics of galaxies, particularly of the Milky Way.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040107/MPCPages.arcLast Updated: 2004-01-07

[ show close-approach data ]
Alternate Designations
 1182 T-2 = 1999 JP65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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