Position angle a hypothetical binary star with a PA of 135 degrees, that means an imaginary line in the eyepiece drawn from the north celestial pole to the primary (P) would be offset from the secondary (S) such that the NCP-P-S angle would be 135 degrees. When graphing visual binary orbits, the NCP line is traditionally drawn downward—that is, with north at bottom—and PA is measured counterclockwise. Also the direction of the proper motion can for example be given by its position angle. The definition of position angle is also applied to extended objects like galaxies, where it refers to the angle
The Octagon House relation to the other street, and outbuildings and wells had to be fitted in also. He dealt with the problem by relating the house equally to both streets, which put the two walls at a 70 degree angle from each other. The house actually has 6 sides, but was called "The Octagon" by the Tayloes. It had closets on every floor, an innovative feature for its time. The house is well built of brick trimmed with Aquia Creek sandstone. The lot is triangular and fenced in by a high brick wall. The kitchen, stable and outhouses are built of brick