Asteroid occultation

The colours are Occult4's. The path is darkest down the middle, where the star hides longest. At the edges it only blinks. The green dotted line is the rest of the track around the world. Labels along the centre line are the time the shadow passes there. Tap the map or drag the pin to move your spot. Everything on this page follows it.

The numbers

Everything here is for the place shown above: when the shadow passes closest, and the chord and fade you'd record. The asteroid is drawn as a sphere. Real ones are lumpy, and timings from several places show the true shape. Once opened, this page works offline, including the map tiles you viewed. Useful where there's no signal.