1989 GB1. Discovered 1989 Apr. 3 by E. W. Elst at La Silla.

Named in honor of Hermann Bohnhardt (1955- ), astronomer at the European Southern Observatory, known for his observational and theoretical studies of comets. He took a particular interest in (7968) Elst-Pizarro, a Themis-family {see planet (24)} minor planet that also appeared in the guise of comet 133P/1996 N2. In addition to the main, sunward tail temporariliy exhibited by this strange object, Bohnhardt detected a faint anti-sunward tail, which he had predicted by means of Finson-Probstein modeling. (M 31298)

With its numbering, the comet received the final designation 133P/Elst-Pizarro. See the citation of planet (7968) for more details.

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