It subsequently appeared again in Sherlock Holmes Through Time and Space (Severn House, 1985), an anthology of stories written by different authors and co-edited by Asimov,[1] and Another Round at the Spaceport Bar (Avon 1989).

However, in 1975 the BSI decided to publish a collection of such articles, and members Banesh Hoffmann and Michael Harrison asked Asimov to write one.

The Dynamics of an Asteroid is mentioned only once in Doyle's novel The Valley of Fear (1914), where it is described as a book renowned for containing such rarefied mathematics that there was supposedly no other scientist capable of fully understanding it.

This idea appealed to Asimov, and he wrote a 1,600-word essay on the matter, "Dynamics of an Asteroid", which was published in Beyond Baker Street: A Sherlockian Anthology (Bobbs-Merrill, 1976).

He is a member of the Baker Street Irregulars, but he has never contributed an article on the subject of Sherlock Holmes, and this omission is causing him increasing embarrassment.