Proper noun
Seidelmann
A surname from German of Swiss origin.
McCarthy and Seidelmann (p. 17) devote most of a page explaining why "the use of the term 'Greenwich Mean Time' or its abbreviation 'GMT' remains a source of confusion today." Source: Internet
Edited by P. Kenneth Seidelmann, "Explanatory Supplement to the Astronomical Almanac", University Science Books,1992, p. 700. This gives : The resulting orbital radius is convert. Source: Internet