The article was promoted.
Self-nomination. The LRL vector is important in celestial mechanics as a convenient method for describing the shape of an orbit, and was historically important in the first derivation of the hydrogen-atom spectrum using modern quantum mechanics. It also reveals a subtle but beautiful symmetry of the Kepler problem, which is the problem of calculating the motion of two particles interacting by gravity or electrostatics. This article is stable, thoroughly referenced and has undergone scientific and non-scientific peer reviews. A translation of this article was voted recently to Good Article status without opposition on the Russian Wikipedia. Although technical, the article has been written as accessibly as possible for the lay-reader. Willow 10:30, 31 December 2006 (UTC) reply
The article was promoted.
Self-nomination. The LRL vector is important in celestial mechanics as a convenient method for describing the shape of an orbit, and was historically important in the first derivation of the hydrogen-atom spectrum using modern quantum mechanics. It also reveals a subtle but beautiful symmetry of the Kepler problem, which is the problem of calculating the motion of two particles interacting by gravity or electrostatics. This article is stable, thoroughly referenced and has undergone scientific and non-scientific peer reviews. A translation of this article was voted recently to Good Article status without opposition on the Russian Wikipedia. Although technical, the article has been written as accessibly as possible for the lay-reader. Willow 10:30, 31 December 2006 (UTC) reply