David, I’m looking for the same matter and I’ve found something to share with you. I replay here, may be others are interested, but without the files I describe (I’ll send them to you), if someone else is interested I’ll send the files to those who request them.
My target is to make a fullerene, the 32 faces solid with 20 hexagons and 12 pentagons, with the stars and the constellation boundaries. I found the coordinates, RA & Dec, of the boundaries of the constellations. They are for the year 1879, when the boundaries were established, and the new values for 2000 due the precession of the equinoxes. I got these data from http://cds.u-strasbg.fr/ where you can find a lot of star catalogues. These files must be arranged to be used, so I transform them in a txt, to be read from my software. boundaries.txt contains the continuos sequence of the boundaries, separated from a comma. Every point has 6 data: RA 2000, Dec 2000, a progressive number, RA 1879, Dec 2000, the abbreviation of the constellations A friend send me a list of the 100 brightest stars with greek letter, constellation, RA, Dec and magnitude. I transform also this list in a txt with data separated by comma. I realize 100 stars are too few, although he says it is impossible to recognize more then 200 stars (about), so I think to look for a list of 300 - 400 stars. None of the files I found have the description of the links among stars of the same constellation, so I think I have to work to build it. This is not an urgent goal among my gnomonic interests so I’ve not finished it. If there is a file with these data I’m also interested. The image you see here is the fullerene as it is now, with the boundaries, no stars, and the ecpliptic. It is about 30 cm high, got from a paper sheet of 105 x 60 cm, to cut, fold and glue. With the same fullerene I made a phisical Earth globe, the Moon and Mars. ciao Fabio Fabio Savian fabio.sav...@nonvedolora.it www.nonvedolora.eu Paderno Dugnano, Milano, Italy 45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2) From: Astrovisuals Sent: Thursday, May 22, 2014 9:56 AM To: sundial@uni-koeln.de Subject: Planetarium app I wonder if anyone can help? I want to produce a basic planetarium app for iPad that shows the appearance of the Night Sky anywhere on earth. I believe I need: A program to convert RA and Dec to Alt-azimuth co-ordinates. A list of stars, plus details about how to add “constellation lines” between selected bright stars. A way of incorporating the Milky Way as a vector file. Would be grateful for any help; am happy to pay for programs, lists etc. And on a different subject, I would like to enter a sundial in the Italian Astronomers’ International contest for sundial makers, but cannot find the form to fill in. Can someone supply a PDF or web address? Thanks, David Widdowson, Astrovisuals Australia www.astrovisuals.com.au -------------------------------------------------------------------------------- --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
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