But I think my hipshot-formula does a pretty ok job now, the target stars always ends up close to the center of the reticle every time, so that's good enough for me. 20°, 30°) isn't constant in the image like I would've thought, it missed the target with up to 10 degrees in the beginning, so I had to throw in a compensating formula (which isn't anywhere exact since I never put time into understanding the geometric "distortion" in the generated image. The chart generated online have some weird non-linear geometry I haven't figured out yet, the distance between altitude-circles (let's say 10°. I had great fun learning tons of new stuff about programming, especially since it's my first go at jscript.
SIMPLE ONLINE SKYCHART HOW TO
asp to figure out how to create my own first. It took me a while to realize jscript uses radians instead of degrees when using the sin/cos functions, but I finally figured out how to overcome that too. After a while I found the formula for Polar to Cartesian conversion, & how to implement them in Jscript. Then I googled around for hours, figuring out how to convert the scope alt/az into coordinates for a reticle on top of the sky-chart image. Here's an example from today, when tracking Castor, and scope-reticle showed correct position by using alt/az from the scope.įirst off, I went to to generate a reusable image-url for my location, to be used inside the tiddler. After countless of hours, the "beta" is available if you want to try it out. So I decided to try & make a new tiddler for the ACP Web UI, namely a chart of the current sky above my observatory, & also a reticle where my scope is pointint. That's not a problem when using a computer, but when I'm on my phone, I often wish for more. Sure, the alt / az info is all there, but since I'm pretty new in astronomy, I prefer to have it all on a nice sky-map in front of me. Since I'm often checking my imaging-progress from my phone, I often wonder where my scope is pointing, & how far from the meridian I am. I've never done jscript before, & had a peek at different parts of ACP to figure out how to use it. In these days of endless bad weather, I've had some time to play around with programming & learning some new things (started from zero when I got ACP last year). * Improved scope-status, now including Slewing, Tracking, Stopped, Parked
* Adjustable transparency for both sky-gradient and alt-az grids The DIF (Dynamic Indexing Facilities) package distributed within the MCS library, creates and manages a combination of Views, Triggers, DB-engine and plug-ins allowing the user to deal with database tables indexed using one or both these pixelisation schema in a completely transparent way.Sk圜hart is now replaced with 1.1 version, read new instructions below This is made possible thanks to the capability offered by MySQL 5.1 to add external plug-ins. Within the MCS library project, we have now made available as MySQL-callable functions various HTM and HEALPix facilities. It is a matter of fact that the astronomical community is accepting the HTM and HEALPix schema as the default for object catalogues and for maps visualization and analysis, respectively. Sky tessellation with various mapping functions have been proposed. Selecting a sub-set of these entries or cross-matching them could be un-feasible if no indexing is performed. Also partial sky surveys at various wavelengths can collect information (not just source lists) which can be saved in coordinate ordered tables. All sky optical and IR catalogues have up to 1 billion objects that will increase with forthcoming projects. In various astronomical projects it is crucial to have coordinates indexed tables.
0 kommentar(er)
