# angle2hms: Convert Astronomical Angle in Degrees to Hours, Minutes and... In oce: Analysis of Oceanographic Data

 angle2hms R Documentation

## Convert Astronomical Angle in Degrees to Hours, Minutes and Seconds

### Description

The purpose of angle2hms is to facilitate comparison of `rightAscension` angles computed by `sunAngle()` and `moonAngle()` with angles reported in astronomical sources and software, which often employ an hour-minute-second notation. In that notation, decimal hour is computed as 24/360 times the angle in degrees, and from that decimal hour are compute integer hour and minute values, plus a decimal second value. It is common in the astronomical literature to use strings to represent the results, e.g. with `11^h40^m48^s.10` for the value used in the “Examples”; see Chapter 1 of Meeus (1991) for more on angle calculation and representation.

### Usage

``````angle2hms(angle)
``````

### Arguments

 `angle` numerical value giving an angle in degrees

### Value

angle2hms returns a list containing values `time` (a numerical value for decimal hour, between 0 and 24), `hour`, `minute`, and `second` (the last of which may have a fractional part), and `string`, a character value indicates the time in hour-minute-second notation, with the second part to two decimal places and intervening `h`, `m` and `s` characters between the units.

Dan Kelley

### References

• Meeus, Jean. Astronomical Algorithms. Second Edition. Richmond, Virginia, USA: Willmann-Bell, 1991.

Other things related to astronomy: `eclipticalToEquatorial()`, `equatorialToLocalHorizontal()`, `julianCenturyAnomaly()`, `julianDay()`, `moonAngle()`, `siderealTime()`, `sunAngle()`, `sunDeclinationRightAscension()`
``````# A randomly-chosen example on page 99 of Meeus (1991).