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    Re: Lewis and Clark lunars: more 1803 Almanac data
    From: Ken Muldrew
    Date: 2004 Apr 16, 13:10 -0600

    On 16 Apr 2004 at 17:33, George Huxtable wrote:
    >  Maybe they have misidentified some other star
    > as Aldebaran. Rigel gives a much closer answer, but still not close
    > enough. I have eliminated any of the four planets, which weren't near
    > the right place at that time.
    If we consider the two series with Aldebaran (A and C in your
    original message) as one series, then a least-squares fit gives an
    apparent motion of the moon of 0.239?/hr. The almanac data shows that
    the moon had an apparent motion with respect to Aldebaran of
    0.534?/hr during that interval. So it would seem that the star Lewis
    and Clark were observing was about 36? off the moon's path. Rigel
    would be pretty close, moreso than Capella. There don't seem to be
    any other obvious candidates. Is there any mention of whether it was
    partly overcast? It's pretty hard to misidentify either Aldebaran or
     O_/ \    Ken Muldrew, PhD      | Voice: (403) 220-5976           |
     <\__  \  Dept. of Cell Biology | Fax:   (403) 270-0617           |
      | /
      "\ L  | University of Calgary | kmuldrew@acs.ucalgary.ca        |
    / /
       <    +-----------------------+---------------------------------+ /
                   Morning coffee recapitulate phylogeny               L/

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