https://phys.org/news/2018-12-geminids-meteor-shower-astrophysicist-outfor.html

The Geminids shower is noted for producing 120 or more meteors per hour, which travel at around 35 kilometres per second, and are often brightly coloured. The colours indicate the main chemical composition of that particular meteor. An orange or yellow colour denotes sodium, yellow signifies iron, blue-green means magnesium and violet indicates calcium. If the meteor appears red, that's nitrogen and oxygen atoms in the atmosphere glowing as they are super heated by the space dust slamming into them at high speed.

3200 Phaethon has a wildly eccentric orbit, quite different to many other asteroids. At its furthest point from the centre of the solar system, 3200 Phaethon enters the asteroid belt between the orbits of Mars and Jupiter, around 360m kilometres from the Sun (for context, Earth is around 150m kilometres from the Sun). At its closest point, it's 21m kilometres away – a mere stone's throw from the Sun, in astronomical terms. Here, the asteroid can bake in temperatures up to 750°C.