Richard wrote:
"This gentleman" ... is Don Yeomans and he has been the Director
of NASA's NEO Program Office since it's inception in 1998.
.. and, moreover:
YEOMANS D.K. (1977) Comet Halley - the Orbital
Motion (Astronomical Journal 82, p. 435).
YEOMANS D.K. (1981) The Comet Halley Handbook
(Pasadena, NASA-JPL Publication, pp. 400-491).
YEOMANS D.K. et al. (1981) The long-term motion of comet
Halley (Monthly Notices of the Royal Astron. Soc. 197, 633-646).
Best wishes,
Bernd
To: damoc...@yahoo.com
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