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9164 Colbert (1987 SQ)
Classification: Main-belt Asteroid          SPK-ID: 2009164
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1511327610649891 4.0773e-08  
a 3.188466104263155 1.8725e-08 au
q 2.706584418363736 1.3138e-07 au
i 3.685668213301295 4.6354e-06 deg
node 325.0138171036775 6.5357e-05 deg
peri 63.8657974835899 6.6953e-05 deg
M 255.0215096521005 1.6698e-05 deg
tp 2459606.913632478565
(2022-Jan-27.41363248)
9.9619e-05 TDB
period 2079.558459726426
5.69
1.8319e-05
5.015e-08
d
yr
n .1731136714701252 1.525e-09 deg/d
Q 3.670347790162575 2.1555e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1576  
   data-arc span      23990 days (65.68 yr)  
   first obs. used      1953-10-01  
   last obs. used      2019-06-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4989  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:12:52  

Additional Information
 Earth MOID = 1.71409 au 
 Jupiter MOID = 1.81052 au 
 T_jup = 3.176 
[ 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 13.0   n/a MPO347598  
diameter diameter 13.626 km 0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.094 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.056   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9164 Colbert           Discovered 1987 Sept. 19 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Edwin H. Colbert (b. 1905) is a distinguished U.S. vertebrate paleontologist who has made major contributions to our knowledge of dinosaur evolution and the earth's geological history, notably by proving the continental connection of Antarctica and southern Africa in Lower Triassic times. The name was suggested by K. Kron.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000726/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 1987 SQ = 1961 DL 
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