[guide-user] magnitude derivation in Charon

Lawrence Harris Jan 24, 2000

I can now routinely get matches in Charon of asteroids but in all cases,
its magnitude estimate is not credible. Looking closely, it correctly
identifies the target and puts a large red cross-hair that covers the
screen - as described in the Charon instructions. But! In the *red*
summary, it quotes a mag figure that is nonsense, and then I realised
that the figure is actually that derived under the **yellow** cursor
(that can be anywhere at start-up) - not the red cross-hair. This is
why all my magnitudes have all been wrong. When I move the yellow
cursor on top of the cross, the magnitude then shows about right.

Can someone clarify the correct sequence to obtain valid magnitudes
during Charon's analysis?

regards

Lawrence