Named in honor of Roger W. Sinnott, associate editor of Sky and Telescope. His extensive telescope-making experience began with a first mirror ground when he was aged 13 and has culminated in his conducting the’ Gleanings for ATMs’ department of the magazine for many years. He also created (with Alan Hirshfeld) the two-volume Sky Catalogue 2000.0 and edited NGC 2000.0 using computer databases. This led to the far-ranging magazine column ‘Astronomical Computing’. (M 16246) _ _.