Disappearing moon

I have tried to find what happen.
As reported by the pervious e-mail the zoom help a lot.
You can always see the moon if you zoom in.
More the moon is near to the sun, more you have to zoom in for to
see again the disappearing moon.
The routine cancel the moon as is a little object?
For example level 1-8 you can't see the moon after yes.
If you can't see in level 7 surely you can't see to level 1.
I can't see the moon and sun label;
Could this be connected?


Delta-t

As reported on 8 Aug 2000: Ability to re-define the delta-t

The formula is before year 948:

DT-UT= 2715.6 + 573.36 * t + 46.5 * t*t

So in year 0 when t = -2000

DT-UT= 2715.6 - 573.36 * 2000 + 46.5 * 2000*2000
DT-UT= 9.848,4 s

Guide reported 9115.7 s why?

Correction of the moon acceleration theory from -23.89 (DE200) to -
26.00 arcsec/cy/cy (starting point 2000):
= -.39 - 1.72 * t - 1.92 * t*t = -732.3

so = 9.848.4 – 732.3 = 9116.1 s as guide is reporting.

But if the moon theory is formulated with an acceleration of -
23.8946, we haven't to correct it for an acceleration of -26.00 …
(as we have to do for the times after 1620)

At the end if in guide.dat we add :

DELTA_T=-100000,948:2715.6,573.36,46.5

Magically in guide we have DT-UT= 9.848,4 s
And also we can have a more favorable similitude with the NASA sun
eclipse historical database…
We have to check also the delta-t from 948 to 1620.

I hope very soon to test Guide with DE406 … and a moon acceleration
of -25.7376
Correction of the moon acceleration theory from -25.7376 (DE200) to -
26.00 arcsec/cy/cy (starting point 2000):
= -.04 - 0.16 * t - 0.18 * t * t …


Ciao Dario