Full source for astronomytonight.net, a site for amateur astronomers. The site has basic astronomy data for any location, and weather data for specific countries (the US and Canada). Customizable for your observing location.
When an occultation is shown in a chart, by following a link from the main page, the rendering is off. The star is not close enough to the Moon's limb. It's off by ~20-40 minutes of time.
I checked the raw calc in ephem.js for the core calc of topocentric positions, and it seems ok (to within about 1 arcmin). The function EPH.apply_parallax_to_αδ(eph, wh) also seems ok.
So the bug is likely elsewhere. Size of the moon? Position of the star? The calc in code.js for the changes to ra, decl due to parallax?
When an occultation is shown in a chart, by following a link from the main page, the rendering is off. The star is not close enough to the Moon's limb. It's off by ~20-40 minutes of time.
I checked the raw calc in ephem.js for the core calc of topocentric positions, and it seems ok (to within about 1 arcmin). The function EPH.apply_parallax_to_αδ(eph, wh) also seems ok.
So the bug is likely elsewhere. Size of the moon? Position of the star? The calc in code.js for the changes to ra, decl due to parallax?