Axel, I agree totally with the comments of Frans Maes.
I would add this comment: The detailed scale of dates with an interval of five days gives the impression that the position of the gnomon for a given day is accurately determined. However, the location of the gnomon depends on the declination of the sun. The corresponding date at a certain value of the declination varies from year to year. For example: At the autumnal equinox, the gnomon must be placed exactly in the center of the ellipse. Depending on the year, it is September 23nd or September 22nd. The corresponding deviation in the time which is indicated in the neighbourhood of 6 o'clock thereby is a few minutes. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be Op 14-okt-2015, om 17:55 heeft axel törnvall gonzalez het volgende geschreven: > Hi All; > > Maybe some of you can help me, I calculated and designed an analemmatic > sundial with hour lines every 5 minutes, and dates every 5 days in the date > Line. > > I printed on a sheet of 420x297 mm (A3) > > The gnomon I use is ¼ " diameter as shown in the photo. (Photo 1) > > > > <DSC_0032cc.JPG> > > Photo 2 a better look what I see > > > > <sundialCasaFinal 297x420-page-001cc.JPG> > > The question is, can separate lines at Noon (12:00) as shown in Photo 3, here > I separate the Hour Lines the wide of the Gnomon, and you can see the shadow, > date 21 of October, Do I get better readings? > <sundialCasaFinalAnchoGnomon1-page-001cc.JPG> > If the separate sundial works when I read the Solar Hour between 06:00 and > noon, I read the west side (edge) of the shade, in this case 11:00 in Photo 4 > <sundialCasaFinalAnchoGnomon2-page-001cc.JPG> > Or I have to read it in the central part of the shadow? > > Hope you understand my English, it's not my first language > > > My best regards > > > > Axel > > from Putaendo, Chile > > > > > > > > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial >
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