"Henry Wilson DSc ." HW@.. wrote in message
...
On Sat, 21 Nov 2009 10:39:14 -0000, "Androcles"

wrote:


"Henry Wilson DSc ." HW@.. wrote in message
. ..
On Sat, 21 Nov 2009 08:53:57 GMT, HW@..(Henry Wilson DSc). wrote:
Sorry, here's the website:
www.scisite.info/R Cru2.jpg

Henry Wilson...www.scisite.info/index.htm

Einstein...World's greatest SciFi writer..


There you are, you old bugger. When you didn't show for a
couple of days I was getting worried about ya.
If you want to space in a URL you need "%20", like this:
www.scisite.info/R%20Cru2.jpg

OK Try this: http://www.scisite.info/r_cru.jpg

Pretty convincing, eh?

Not bad. Now do it with 100 points as I did.
http://www.androcles01.pwp.blueyonde...Lightcurve.xls

Eccentricity .25
Yaw angle 82
Pitch angle 0
Distance 280
Phase 1
Sample 0




Note, 'velocity' is true radial velocity towards Earth. It includes pitch.
I
haven't bothered to set either distance or velocity at any measured value
because I cannot find reliable figures.

EXACTLY!
Distance is the Holy Grail of Astronomy, that's why Hipparcos
and Tycho were launched.


Hipparcos and Tycho give different
values for parallax. 1.9 and 3.1 mas respectively. However, the product
(distance x velocity) is the important factor. Reducing one by a
particular
factor and increasing the other by the same amount produces the same
curve, as
you should know.

http://en.wikipedia.org/wiki/File:Hi...accuracies.gif

I have a question, though.
Why does your program refer to more than one star?
A cepheid is a star and a planet, not a double star.