X-Nico

2 unusual facts about Proper motion


Proper motion

Currently, the nearby star with the largest true velocity (relative to the Sun) is Wolf 424 which moves at 555 km/s (or 1/540 of the speed of light).

In 1992, Rho Aquilae became the first star to have its Bayer designation invalidated by moving to a neighbouring constellation - it is now a star of the


Ursa Major Moving Group

The Ursa Major Moving Group was discovered in 1869 by Richard A. Proctor, who noticed that, except for Dubhe and Alkaid (Eta Ursae Majoris), the stars of the Big Dipper asterism all have proper motions heading towards a common point in Sagittarius.


see also

Pan-STARRS

Prior proper motion and parallax surveys often did not detect faint objects such as the recently discovered Teegarden's star, which are too faint for projects such as Hipparcos.

Willem Jacob Luyten

He also discovered some of the Sun's nearest neighbors, including Luyten's star as well as the high–proper motion star system Luyten 726-8, which was soon found to contain the remarkable flare star UV Ceti.