calculating sunset

Hi,
Can anyone help please? I need to know how to calculate the time of
sunset, given in BST, on September 2nd 2006 at Lat 54:07:15N,
Lon 1:11:52 W. Any offers?

try here...
http://aa.usno.navy.mil/data/docs/RS_OneDay.html

cheers.


Bardo1ph wrote:
Hi,
Can anyone help please? I need to know how to calculate the time of
sunset, given in BST, on September 2nd 2006 at Lat 54:07:15N,
Lon 1:11:52 W. Any offers?

"dylan" wrote in
ups.com:

try here...
http://aa.usno.navy.mil/data/docs/RS_OneDay.html

cheers.


Thanks for that!

mike

"Bardo1ph" wrote in news:1149151423.646914.288360
@i39g2000cwa.googlegroups.com:

Hi,
Can anyone help please? I need to know how to calculate the time of
sunset, given in BST, on September 2nd 2006 at Lat 54:07:15N,
Lon 1:11:52 W. Any offers?


The necessary calculation is built into most planetarium software. If you
just want to know the result then download a freeware one like Cartes Du
Ciel, or otherwise there are plenty of commercial ones available. If you
are wanting to know how to do the calculation then I would recommend
getting hold of a copy of the book "Astronomical Algorithms" by Jean Meeus
available from Willman-Bell. Ok it has a lot more than you need to know but
it's a great reference.

http://www.willbell.com/math/mc1.htm

Sunrise and Sunset are interesting in that the same definition is not used
in all countries. In some places they use the center of the Sun's disk as
the reference point rather than the more common last or first edge of the
Sun crossing the horizon

Klazmon.

"Llanzlan Klazmon" wrote in message
7.6...
snipped
Sunrise and Sunset are interesting in that the same definition is not
used
in all countries. In some places they use the center of the Sun's disk
as
the reference point rather than the more common last or first edge of
the
Sun crossing the horizon

Klazmon.
Yes. Indeed different definitions may exist in the same country, for
different applications. You also have even more variation, when dealing
with when 'night' begins, with seperate definitions for 'civil twilight',
'nautical twilight', and 'astronomical twilight', each giving different
distances that the Sun has to have gone below the horizon. In the UK,
there is also 'aviation nightfall', which is slightly between the end of
civil, and nautical twilight...

Best Wishes