Does Polaris belong to Ursa Major or Ursa Minor?

Polaris is the alpha star of Ursa minor, also known as purple MSI. It is a bright star in the north-central part of the sky, close to the north celestial pole, almost facing the earth axis. From the earth's point of view, its position is almost unchanged, which can be used to identify the direction.

Due to precession, Polaris is not an eternal star. Now it is Alpha Ursa minor, and it will be Vega in the year of 14000. Every 2000 years, Polaris will cycle once. For example, during Magellan's voyage, Polaris was about 8 degrees from the north celestial pole. Today, Polaris is closer to the north celestial pole with an angle difference of only 40'. According to the calculation of the earth's axis swing and stellar gravity, by 2 100, Polaris will reach the nearest position directly above the north celestial pole, only 28' away from it, and then it will gradually move away from the north celestial pole.

Polaris is now in the sky, pointing to the north pole of the earth. Therefore, it always seems to be in the northern sky. It is because of its important position that it is famous. In fact, according to the brightness, it is just an ordinary second-class star, belonging to "Little Three". It is about 400 light years away (that is, the light from the Polaris we see). On the constellation diagram, it is on the tip of the bear's tail.