I live in the UK at a longitude of 0'43'', can I use the setting numbers on the settigs card that comes with the TPA or is there a different calculation?
Tuthill Polar Alignment Tool Settings
Started by alpineman, 01/31/2007 06:29AM
Posted 01/31/2007 06:29AM
Opening Post
Posted 02/03/2007 02:04AM
#1
Wayne,
I do not own the Tuthill unit but do use the same calculations for my homebuilt version. So, the quick answer to your question is, NO. No alterations to the formula are needed for your side of the pond. Using our own time zones takes care of that.
[COLOR="Red"]However[/COLOR],
I do have another related question. When I started using Tuthill's formula (early 90's) the starting point for the calculations was the 9th of every month. For example,9pm, Jan.9 = 330°. The last unit I saw for sale here on astromart had a sticker on it with the starting point being the 14th of every month. Do you (or anyone else here) know if the date changes as the years pass and at what rate?
Bob
ps. Just curious, what is the starting date on your card and do you know the date of manufacture?
I do not own the Tuthill unit but do use the same calculations for my homebuilt version. So, the quick answer to your question is, NO. No alterations to the formula are needed for your side of the pond. Using our own time zones takes care of that.
[COLOR="Red"]However[/COLOR],
I do have another related question. When I started using Tuthill's formula (early 90's) the starting point for the calculations was the 9th of every month. For example,9pm, Jan.9 = 330°. The last unit I saw for sale here on astromart had a sticker on it with the starting point being the 14th of every month. Do you (or anyone else here) know if the date changes as the years pass and at what rate?
Bob
ps. Just curious, what is the starting date on your card and do you know the date of manufacture?
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