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A plot of hours of daylight as a function of the date for changing latitudes. This plot was created using the simple sunrise equation, approximating the sun as a single point and does not take into account effects caused by the atmosphere or the diameter of the Sun. The sunrise equation or sunset equation can be used to derive the time of ...
The International Date Line around the antimeridian (180° longitude). The International Date Line ( IDL) is the line between the South and North Poles that is the boundary between one calendar day and the next. It passes through the Pacific Ocean, roughly following the 180.0° line of longitude and deviating to pass around some territories and ...
Equinox. A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September.
For a given latitude and a given date, calculate the declination of the Sun using longitude and solar noon time as inputs to the routine; Calculate the sunrise hour angle using the sunrise equation; Calculate the sunrise time, which is the solar noon time minus the sunrise hour angle in degree divided by 15; Use the sunrise time as input to the ...
The United States Naval Observatory states "the Equation of Time is the difference apparent solar time minus mean solar time ", i.e. if the sun is ahead of the clock the sign is positive, and if the clock is ahead of the sun the sign is negative. [6] [7] The equation of time is shown in the upper graph above for a period of slightly more than a ...
For a given latitude and a given date, calculate the declination of the Sun using longitude and solar noon time as inputs to the routine; Calculate the sunset hour angle using the sunset equation; Calculate the sunset time, which is the solar noon time plus the sunset hour angle in degree divided by 15; Use the sunset time as input to the solar ...
ISO 8601. International standard ISO 8601 ( Representation of dates and times) defines unambiguous written all-numeric big-endian formats for dates, such as 2022-12-31 for 31 December 2022, and time, such as 23:59:58 for 23 hours, 59 minutes, and 58 seconds. These standard notations have been adopted by many countries as a national standard, e ...
Here are sunrise and sunset times for the next 10 days in Kansas City. ... This sunset time will last 11 days, from Saturday, Dec. 2 through Tuesday, Dec. 12.