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Fred,
Finally I obtained a relally good measurement for
Vega-Arcturus distance!

Sept 29, GMT 0h5m:
Arcturus-Vega, alt(Arctur)=30d, alt(Vega)=83.
Galileo scope, 4x40:
SEXT DIST           ERROR
59d06.5'            -0.6'
59d06               -0.1'
59d08.3'            -2.4'
59d06.6'            -0.7'
59d05.8             +0.1'
59d05.7             +0.2'
Kepler (inverting) scope 7x30 with cross-hairs:
SEXT DIST           ERROR
59d05.8'            +0.1'
59d06.0'            -0.1'
59d05.9'             0.0'
59d05.8'            +0.1
59d05.8             +0.1

Computed distance (corrected for refraction): 59d05.9'

This I call a good result! You can almost see my learning curve
in this table:-)
And I have to withdraw some of my early statements about the
inverning scope. It is not so bad, after all.

The stars are indeed surrounded by "hairs of light", like a corona,
but in the middle of this corona there is really a sharp point.
And the cross hairs indeed help to keep the whole action in the middle
of the field of view.

It is interesting: I am somewhat confused because the Russian manual
calls the Galileo scope "the night scope" and the inverting one
"the day scope". The manual says: "attach the inverting one for Sun
observations and the Galileo for night observations.

Now I feel like doing just the opposite.

And it is easier than learning to play piano indeed:-)

Alex.

On Wed, 29 Sep 2004, Fred Hebard wrote:

> Part of it is practice, lots of practice.  It's not as hard as learning
> to play a piano, but it takes some proficiency.

   

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