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Which country's southernmost point almost equals in latitude that for the southernmost limit of nautical twilight all night?
Denmark.
Denmark's southernmost point is at approximately 54° 33' 32.7" N[1]. The southernmost limit (Northern Hemisphere) that nautical twilight could continue through local solar midnight for 2013, was at approximately 54° 33' 52.049" N[2] (calculated using true obliquity of the ecliptic). The latitude is approximately 598 metres or 654 yards further north than the southernmost point of Denmark.
For 2014 54° 33' 54.232" N[2], approximately 666 metres or 728 yards further north than the southernmost point of Denmark.
The next closest is the southernmost point of Scotland at approximately 54° 37' 59.85" N[3]. The southernmost limit (Northern Hemisphere) that nautical twilight could continue through local solar midnight for 2013, was at approximately 54° 33' 52.049" N[2]. The latitude is approximately 7.662 kilometres or 4.761 miles further south than the southernmost point of Scotland.
For 2014 54° 33' 54.232" N[2], approximately 7.595 kilometres or 4.719 miles further south than the southernmost point of Scotland.
1. Sent to me from the National Survey and Cadastre of Denmark or KMS.
2. A Finnish Professor (Finnish Geodetic Institute) calculated the latitudes of the Arctic Circle to 2049, using True Obliquity of the Ecliptic. Furthermore GIT Barents website also uses True Obliquity of the Ecliptic for the Arctic Circle. A simple calculation (90° - True Obliquity of the Ecliptic at the 2013 Northern Hemisphere Summer Solstice 23° 26' 07.951" = Arctic Circle 66° 33' 52.049" N - Nautical Twilight when the centre of the sun is at a maximum of 12° below the horizon = 54° 33' 52.049" N) (90° - 23° 26' 07.951" = 66° 33' 52.049" - 12° = 54° 33' 52.049" N) gave me the latitude; using PHP Science Labs Obliquity of the Ecliptic and Nutation in Obliquity:
3. Scotland's southernmost point Mean High Water Springs, from 1:25,000 digital mapping software using Ordnance Survey mapping.
What else can I help you with?
What is the cutoff - southernmost - latitude for astronomical dusk - start of twilight - near the summer solstice?
At the summer solstice the sun sets on the northern horizon at latitude 66.6 degrees north. At the same time astronomical twilight ends only at latitudes below 48.6 degrees north. It's 66.6 minus 18 because for astronomical twilight to end the Sun's centre must be 18 degrees below the horizon.
During what period of time does twilight take place?
Twilight occurs during the early morning just before sunrise and in the evening just after sunset. It is divided into three phases: civil twilight, nautical twilight, and astronomical twilight, each lasting for about 30-60 minutes.
Simple Question - Is there anywhere in England where astronomical twilight ends at night near June 21st?
No it only happens south of 48½ degrees north latitude.
Does latitude affect how dark it gets?
No, but latitude affects how long it stays dark. For example: At 90 degrees latitude, either north or south, the sun will set and stay down for 6 months, then will rise and stay up for the next 6 months. Yes, latitude indeed affects how dark it gets. For example north of the Arctic Circle there is no night or even twilight and latitudes slightly below the Arctic Circle experience a night-long twilight.
How Soon After Sunset Does the Sky Become Dark?
The time it takes for the sky to become dark after sunset can vary, but generally it takes around 30-60 minutes for the sky to transition from sunset to darkness. This transition period, known as twilight, is divided into civil twilight (when the sun is 0-6 degrees below the horizon) and nautical twilight (6-12 degrees below the horizon), before finally entering astronomical twilight when the sun is 12-18 degrees below the horizon.
Do you have a chart with Begin nautical twilight times?
For the times of nautical and civil twilight you need to refer to a nautical almanac.
Does it get darker than astronomical twilight in Newcastle-upon-Tyne England in June?
No because the latitude is 55 degrees N so the Sun never goes more than 11½ degrees below the northern horizon, so nautical twilight and astronomical twilight do not end.
What is the cutoff - southernmost - latitude for astronomical dusk - start of twilight - near the summer solstice?
At the summer solstice the sun sets on the northern horizon at latitude 66.6 degrees north. At the same time astronomical twilight ends only at latitudes below 48.6 degrees north. It's 66.6 minus 18 because for astronomical twilight to end the Sun's centre must be 18 degrees below the horizon.
What is another word for dawn beginning with the letter d?
daybreak. another name is twilight. It is recognized by the presence of weak sunlight. Twilight comes at three levels. Astronomical twilight- The sky is no longer completely dark. Nautical twilight- When the horizon and a few objects are distinguishable. Civil twilight- When there is enough light so objects can be distinguished and out door activities can be commensed. Also the same is true for sunset. only in reverse, starting with Civil twilight, Nautical twilight, Astrononmical twilight.
What is the meaning of Twilight?
Twilight is when the sun is below the horizon- either has not yet risen, or has just set. Civil twilight- what most people mean when they say twilight- the sun is no more than 6 degrees below the horizon. There is also nautical twilight, where the sun can be as much as 12 degrees below the horizon. That time is used by sailors to take "sightings" on stars with a sextant for navigation. In Nautical twilight, you can see stars, but there is still a visible horizon to use in your sightings.
What time is sunset in canton Ohio on October 16 2009?
in USA central timeAstronomical twilight begins: 10:07 Nautical twilight begins: 10:39 Civil twilight begins: 11:11 Sunrise: 11:37Transit (sun is at its highest): 12:10 Sunset: 22:44Civil twilight ends: 23:10 Nautical twilight ends: 23:42 Astronomical twilight ends: 00:13 on Friday 16th october 2009
What is the meaning of 'Civil' Twilight?
Twilight is when the sun is below the horizon- either has not yet risen, or has just set. Civil twilight- what most people mean when they say twilight- the sun is no more than 6 degrees below the horizon. There is also nautical twilight, where the sun can be as much as 12 degrees below the horizon. That time is used by sailors to take "sightings" on stars with a sextant for navigation. In Nautical twilight, you can see stars, but there is still a visible horizon to use in your sightings.
How dark is nautical twilight?
According to the United States Naval Observatory, "At the beginning or end of nautical twilight, under good atmospheric conditions and in the absence of other illumination, general outlines of ground objects may be distinguishable, but detailed outdoor operations are not possible. During nautical twilight the illumination level is such that the horizon is still visible even on a Moonless night allowing mariners to take reliable star sights for navigational purposes, hence the name."
How many twilights are they and what are they called?
4. The first one is called Twilight. The second one is called New Moon The third one is called Eclipse. The fourth one is called Breaking Dawn. Plus there is a novella called The Second Life Of Bree Tanner.
What countries never get darker than nautical twilight - but get darker than civil twilight - near the summer solstice in the Northern Hemisphere?
The answer is those countries where the Sun's minimum altitude at midnight is between 12 and 18 degrees below the horizon. That means any place with a latitude 12-18 degrees less than the Arctic circle. That is a latitude range of 48½ degrees to 54½ degrees north. Any place within that range qualifies. An atlas will enable all those countries to be located.
What are the twilight in order?
The three stages are measured in minutes from sunset until the three types end - civil twilight, nautical twilight and astronomical twilight. Civil twilight ends when the sun is six degrees vertically below the horizon, nautical twilight when it is twelve degrees below, astronomical twilight when it is eighteen degrees below.
Is a kind of twilight where the interval between the sun's being 6 degrees below the visible horizon and 12 degrees below it?
The kind of twilight you are referring to is known as civil twilight. During civil twilight, the sky is still somewhat illuminated, and it is often the time when outdoor activities can still be carried out without artificial lighting.
