4657 P-L. Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld at Palomar.

Named in honor of Mayo Greenberg {1922-2001} on the occasion of his 70th birthday. Well known for his model of cometary and interstellar grains, he worked at the State University at Albany and later as head of the Astrophysical Laboratory in Leiden. (M 20162)

Obituaries published in Bull. Am. Astron. Soc., Vol. 34, No. 4, p. 1362 (2002), Int. Comet Q., Vol. 23, No. 4, p. 153 (2001).

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