# What determines sunrise sunset times?

## What determines sunrise sunset times?

How are the times of sunset and sunrise determined? A. Sunset and sunrise have exactly the same definition: the time when the apparent uppermost ray of the Sun is on the astronomical horizon. If it is the first ray, it is sunrise and if it is the last ray, it is sunset.

How is sunrise predicted?

For an ideal sunrise or sunset, you should look for a high cloud cover. If the clouds are too low, they will block the red and orange colors that we are hoping to see in the sky. We also want to see very puffy clouds. If the cloud cover is too thick, those red and orange wavelengths won’t be able to penetrate them.

### What affects sunrise time?

The Earth’s orbit around the Sun is elliptical, rather than circular, and the Earth’s axis of rotation is not perpendicular to the plane of the orbit. This non-circularity of the orbit and the tilt of the Earth’s axis of rotation both contribute to the uneven changes in the times of sunrise and sunset.

Does sunrise mean the Sun is completely up?

We all know that sunrise or dawn is when the sun comes up, and sunset or dusk is when it goes down. The published times of sunrise and sunset refer to the moment when the Sun’s upper limb, as affected by refraction, is on the true horizon of an observer at sea-level.

#### How do you use the sunrise equation?

Sunrise/Sunset Calculations where the positive number corresponds to sunrise, negative to sunset. Then the UTC time of sunrise (or sunset) in minutes is: sunrise = 720 – 4*(longitude + ha) – eqtime where longitude and hour angle are in degrees and the equation of time is in minutes.

How is sunset time determined?

When is sunrise and sunset? We all know that sunrise or dawn is when the sun comes up, and sunset or dusk is when it goes down. This occurs when the Sun’s centre is 50 arcminutes below the true horizon, the upper limb then being 34 arcminutes (just more than the Sun’s apparent diameter) below the true horizon.

## What is Sunrise-Sunset?

Check sunrise, sunset, dusk and dawn times for any location in the world! Sunrise-Sunset is a free online tool that provides users information about day length, twilight, sunrise and sunset times for any location of the world.

Is there a way to check sunrise and sunset times?

Sunset and sunrise times Check sunrise, sunset, dusk and dawn times for any location in the world! Sunrise-Sunset is a free online tool that provides users information about day length, twilight, sunrise and sunset times for any location of the world.

### What is the latest sunrise in January?

The Earth was closest to the Sun at this time. Latest sunrise is on January 7 or January 8. What is twilight, dawn, and dusk? What is solar noon?

What is the difference between sunrise and Twilight?

Duration of twilight actually depends on our position on Earth and date of year. For example at Arctic and Antarctic latitudes, on winter, night never gets completely dark. The sunriseis the exact instant at which the upper edge of the Sun becomes visible over the eastern horizon, in the morning. It’s also called sun up.