Many thanks for reply,i am very new to astronomy and need all the help i can
get. I live in a small village 60 k east of Seville (Marchena) weather is
great wine is cheap and clear skies no light polution . the only problem is no
local contacts or astonomy shops so i have to make anything i need.Once again
many thanks --- In atm_free@yahoogroups.com, Mark Holm <holmmarkd@...> wrote:
>
> Longitude changes only your local time - UT offset. Planispheres
> usually are operated on local time, so the only thing to keep in mind is
> daylight savings. Planispheres usually don't include correction for it,
> so use local standard instead of local daylight. Latitude makes a
> difference in where the horizon lines are and the apparent height,
> north-south of things. A lot of planispheres are laid out for 40
> degrees North. If your's is, then 3 degrees off isn't going to be
> terribly noticeable. If your planisphere was laid out with London in
> mind, at 51 North, then it's going to be off a fair bit. The errors
> having to do with latitude are only regarding the horizon lines. The
> north pole is still the north pole and stars still go around it. Star
> maps usually don't have horizon lines, so they are independent of
> latitude. The big change is for you to get used to seeing things
> shifted 14 degrees, including seeing more southerly constellations that
> you never saw from London, and having to say goodbye to some of your
> circumpolar friends part of the year.
>
> The obnoxious thing about living away from the prime meridian is that
> when an event happens at a particular time, and is listed in UT, you
> have to do the addition or subtraction to get to your local time. Then
> there is the daylight savings boondoggle to figure in on top.
>
> Hope you enjoy Sevilla.
>
>
> monje380 wrote:
> >
> >
> > Can anyone tell me if my lat and long will make any difference to my
> > planisphere . My location 37.17.402n 05.23.246 , all of my books maps
> > etc are based on my previous location which was london.
> >
> > _
>
>
>
>
> > _,_._,___
>
>
> --
> Mark Holm
> markholm@...
> holmmarkd@...
>