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Dear Kermit,
To obtain a complete picture about Cook's observations,
one has to read ALL my messages titled Point Venus.
My first two messages on this subject contain some questions
(something I was puzzled about), but the next messages solve
most of those puzzles.

I mean I was writing my messages in the process of
doing this 
research, and never submitted a final, edited version.

Alex.

On Mon, 1 Apr 2012, utf-8?Q?Antoine Cou=C3=ABtte?= wrote:

>
> Alex,
>
>
>> What I would consider a useful improvement is adding more stars.
>
> I totally agree with you on this point. It is possible that Frank might have 
developed an improved version with (many) more stars. But I do not recall 
having read anything about this. Frank, are you here ?
>
> Another improvement could also be to adapt this Lunars Calculator to also 
deal with Occultations by the Moon (simply enter Distance = 0). This would 
definitely require adding many (many) more stars. While this Lunars 
calculator is NOT advertised for Occultations, I have checked it for some 
Occultations a few years back. I found that its results accuracy then was in 
the +/- 0.2' range, which is slightly degraded when compared to "True 
Lunars". As earlier indicated, for "True Lunars" (let's say with Body to Limb 
Distances greater than 15?/20?, a value Frank will further correct if 
necessary) I have observed that its overall accuracy always lies within +/- 
0.07' in the 1750 - 2050 time span. One thing of importance though : 
Occultations - even dealing with an ideally spherical Moon - are subject to 
(sometimes highly) non-linear effects which can mislead "standard" Lunars 
Algorithms otherwise extremely efficient to tackle Lunars. And also there 
exist to-day some excellent Software dedicated to Occultations and/or 
Eclipses.
>
>
>>  At least my study of the accuracy of Cook's and some XIX century 
observations gave meaningful results with Frank's calculator.
>
> Do you have the reference (if any) to some of your earlier posts in which 
you commented Cook's Results Accuracy. This I have done too for some of them, 
also using Google Earth to check actual coordinates.
>
>
> Best Regards
>
> Kermit
>
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