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The sunrise equation or sunset equation can be used to derive the time of sunrise or sunset for any solar declination and latitude in terms of local solar time when sunrise and sunset actually occur. Formulation
Extreme of darkest storm clouds, sunset or sunrise 10 1: 1 decalux: 40 lux: Fully overcast, sunset or sunrise 10 2: 1 hectolux < 200 lux: Extreme of darkest storm clouds, midday 400 lux: Sunrise or sunset on a clear day (ambient illumination) 10 4: 10 kilolux: 10–25 kilolux: Typical overcast day, midday 20 kilolux: Shade illuminated by entire ...
Blue hour usually lasts about 20–96 minutes right after sunset and right before sunrise. Time of year, location, and air quality all have an influence on the exact time of blue hour. [ 7 ] For instance in Egypt (every 21st of June ), when sunset is at 7:59 PM : blue hour occurs from 7:59 PM to 9:35 PM.
Sun path, sometimes also called day arc, refers to the daily (sunrise to sunset) and seasonal arc-like path that the Sun appears to follow across the sky as the Earth rotates and orbits the Sun. The Sun's path affects the length of daytime experienced and amount of daylight received along a certain latitude during a given season.
According to the 2020 census, the township has a total area of 27.5 square miles (71 km 2), all land. [3] Since 2006 the township has the latest annual sunset of any location in Indiana (every late June about a week after the solstice) when the entire eastern time zone part of Indiana for the first time was completely on day light savings time, and latest annual sunrise of any location in ...
In sunrise/sunset tables, the atmospheric refraction is assumed to be 34 arcminutes, and the assumed semidiameter (apparent radius) of the Sun is 16 arcminutes. (The apparent radius varies slightly depending on time of year, slightly larger at perihelion in January than aphelion in July, but the difference is comparatively small.) Their ...
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A table of hours is shown for a sequence of seven days, with the day of the week indicated both for the sunrise (hour 1) and the sunset (hour 13) naming conventions. Day hours are calculated by adding up the amount of minutes from sunrise and sunset, then dividing by 12.