(2145) Blaauw

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( 2145 ) Blaauw is an asteroid of the outer main belt, which was discovered on October 24, 1976 by the Danish astronomer Richard Martin West at La Silla Observatory of the European Southern Observatory in Chile ( IAU code 809). Unconfirmed sightings of the asteroid there had been before: on December 24, 1929 (1929 XS) at Lowell Observatory in Arizona and in September 1963 (1963 RK) at the Karl Schwarzschild Observatory in Tautenburg forest.

The mean diameter of the asteroid is at 34.20 ( ± 1.9 ) km, the surface is coated with an albedo of 0.0869 (± 0.010 ) darker than any planet's surface in the solar system average. The rotation period was by a team of Rose- Hulman Institute of Technology in Terre Haute, Indiana studied with shots that, from 11 to 23 February 2012 with the 50 -cm Ritchey -Chrétien telescope of the Oakley Southern Sky Observatorys in Coonabarabran New South Wales had been made. The analyzes showed a rotation period of 12.141 (± 0.003) hours. However, the result has an uncertainty of up to 30 percent.

( 2145 ) Blaauw was appointed on 1 July 1979 at the suggestion of Richard Martin West after the Dutch astronomer Adriaan Blaauw ( 1914-2010 ).