I am studying a subject related to the Greek Eratosthenes, as measured by the
circumference of the earth, but I have a problem with measuring the distance
between 2 points (coordinates) formulas I used were taken from writings of Carl
Sabanski, who says that books are ancient astronomy. No
with sin equate to 0, so
X = 360 * 111.133
= 40007.88 km
Cheers
Hank
From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On
Behalf Of axel törnvall gonzalez
Sent: Monday, 19 March 2012 11:42
To: Sundials
Subject: Eratosthenes
I am studying a subject
Hi all;I hope you can help me, I am designing a sundial analematic in the city
of Iquique, Chile, for different schools
Latitude 20 ° 14'32 .75 Slongitude 70 ° 07'59 .29 W
Sun is north to between 16 January and 22 November, between these dates is
going south in my date box. In January 1 I´m
Hy Fabio
Nice Work , I printed it with my coordinates, and I checked and it works, I'll
follow up in time, I have my own machine to search the true north (where I
live, Southern hemisphere true South)My best regardsAxel
From: fabio.sav...@nonvedolora.it
To: sundial@uni-koeln.de
Thanks again for all the answers and explanations, I'm new in this, and only a
lover of Sundials and some astronomy. I saw all the Web sites you use and I
find very interesting, and very complex. I'll see if I can buy the book
Astronomical tables of the Sun, Moon and Planets, Jean Meeus, I
Thanks for your answers, and for you Fabio that personally wrote to my mail,
We all arrived at different results, but the differences are minute
in longitude and with a circumference of the earth at latitude 0 °, (Equator)
of which is 40.075,036 kilometers, every minute of that difference is
This is my Subject;
Finding the position, Longitud, where, the sprig equinox, will ocurr at noon, I
found some diference between the results of The Dialist´s Companion, and Sun
v.5.6 Of R.Cernic, both programs I work for some time.
In Longitud 42°12,80 E at 13:03:42 PM it will be Noon,
