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3. Hour Angles

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Convert Hour Angles to:

• Hour Angles to Angular Mils

  • 1 Angular Mil equals exactly 2π/6400 radians. Radians (rad) are the SI unit for measuring a plane angle.

• Hour Angles to Arcminutes

  • 1 Arcminute (Minute of Arc - MOA) is equal to exatly one 60^th of a degree. In terms of the SI unit radians this is π/10800 or approximately 0.290 888 x 10^-3 rad.

• Hour Angles to Arcseconds

  • 1 Arcsecond is equal to exactly one thirtysix-hundredth arc degrees (1°/3600). In terms of radians (SI unit) this is π/648000 rad or approximately 4.848 137 x 10^-6 rad.

• Hour Angles to Binary Degrees

  • 1 Binary degree or binary radian (brad) is 1 turn/256. In terms of the SI unit radians this is π/128 rad.

• Hour Angles to Centesimal minutes of arc

  • 1 Centesimal minute of arc is defined as one one-hundredth of a gradian (1 grad/100). In SI terms this is 2π/400000 radians or approximately 0.157 080 x 10^-3 rad.

• Hour Angles to Centesimal seconds of arc

  • 1 centesimal second of arc is defined as one ten-thousandths of a gradian (1 grad/10000). In SI units this is 2π/4000000 radians or approximately 1.570 796 x 10^-6 rad.

• Hour Angles to Centiturns

  • 1 Centiturn is exactly 1 turn/100 or 3.6° (degrees of arc). In terms of the SI unit radians this is π/50 radians.

• Hour Angles to Degrees

  • 1 degree of arc is define as 1/360 of a revolution. In SI units 1° is π/180 radians.

• Hour Angles to Diameter Parts

  • 1 Diameter Part is defined as 1/60 radians (SI unit).

• Hour Angles to Gradians

  • 1 gradian is exactly 1/400 of a revolution or 2π/400 or 0.9°. In terms of the SI unit radians 1 grad is approximately 15.707 963 x 10^-3 rad.

• Hour Angles to Hexacontades

  • 1 Hexacontade is equal to 6° (degrees of arc) or 1 turn/60. In SI units 1 hexacontade equal π/30 radians.

• Hour Angles to Milliturns

  • 1 Milliturn is exactly 1 turn/1000 or 0.36° (degrees of arc). In terms of the SI unit radians this is π/500 radians.

• Hour Angles to Minutes of time

  • 1 Minute of time (astronomical) is equal to 1 turn/1440. In terms of the SI unit radians 1 minute of time equals π/720 rad.

• Hour Angles to Octants

  • 1 octant is exactly 45° (degrees of arc). In terms of the SI unit radians this is approximately 0.785 398 rad.

• Hour Angles to Pechus

  • 1 Pechus is equal to about 2° (or possibly 2½°). If a pechus is 2° then it is approximately equivalent to π/90 radians (SI).

• Hour Angles to Points (navigation)

  • 1 Point (navigation) is 1 turn/32 or 1/8 of a right angle or 11.25° or 12.5 grad. In radians (SI unit) 1 point is π/16 rad.

• Hour Angles to Quadrants

  • 1 Quadrant is exactly 90° (degrees of arc). In terms of the SI unit radians 1 quardrant is approximately 1.570 796 rad.

• Hour Angles to Quarter Points (navigation)

  • 1 Quarter Point (navigation) is 1 turn/128. This is approximately 2.8125° or in SI units exactly π/64 radians.

• Hour Angles to Radians

  • 1 Radian is defined as the angle subtended at the center of a circle by an arc whose length is equal to the circle's radius. One full turn is 2π radians.

• Hour Angles to Seconds of time

  • 1 Second of time (astronomical) is equal to 1 turn/86400. In radians (SI unit) 1 second of time is π/43200 rad.

• Hour Angles to Sextants

  • 1 Sextant is exactly 60° (degrees of arc). In SI units 1 sextant is approximately 1.047 198 rad.

• Hour Angles to Signs

  • 1 Sign is exactly 30° (degrees of arc). In terms of the SI unit radians 1 sign is approximately 0.523 599 rad.

• Hour Angles to Turns

  • 1 Turn (or cycle, full circle, revolution, rotation) is equal to exactly 360° (degrees of arc) or 2π radians (SI unit) or 400 gradians or 4 right angles.

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