Calculate Sunset Local Time: 36N, 6E | Hour Angle, Declination Angle & More!

  • Thread starter antonyda
  • Start date
  • Tags
    Local Time
In summary, in order to calculate the sunset local time for a location with a latitude of 36 N and longitude of 6 E, the hour angle was first determined to be 86.25. However, without the day number and month, it was not possible to determine the declination angle and the equation of time. The solar altitude angle was also unable to be calculated due to the nature of sunset and sunrise. Instead, the declination angle of solar altitude relation was calculated to be -5.144. However, this led to a negative value when attempting to calculate the day number, indicating an error. As a result, the time correction factor of 1 hour may need to be considered.
  • #1
antonyda
2
0
calculate the sunset local time for a location : latitude = 36 N , longitude = 6 E
if the apparent solar time at this moment was 17h,45 , and ?
i started with hour angle h = 86.25 , after that i tried to determine the declination angle d but i don't have the day number and the month , also that for equation of time i can't determine and for the solar altitude angle =0 since for sunset and sunrise so i calculated the declination angle of solar altitude relation and i get a d= -5.144 and when i tried to calculate the day number of declination angle i had a negative value and that's wrong
so what to do
 
Physics news on Phys.org
  • #2
the time correction factor = 1 hour
 

Attachments

  • 20150522_163116.jpg
    20150522_163116.jpg
    57 KB · Views: 416

1. What is the purpose of calculating sunset local time?

The purpose of calculating sunset local time is to determine the exact time at which the sun sets in a specific location. This information can be useful for planning outdoor activities, scheduling events, and understanding the Earth's rotation and position relative to the sun.

2. How is sunset local time calculated?

Sunset local time is calculated using a combination of factors including the location's latitude and longitude, the declination angle of the sun, and the hour angle. The hour angle is the angular distance of the sun from the observer's meridian, while the declination angle is the angular distance of the sun from the celestial equator.

3. What is the significance of the latitude and longitude in calculating sunset local time?

The latitude and longitude of a location are important in calculating sunset local time because they determine the position of the observer on the Earth's surface. This information is necessary to determine the angle at which the sun sets and the length of daylight at a specific location.

4. How does the declination angle affect sunset local time?

The declination angle of the sun is the main factor that determines the length of daylight at a specific location. As the declination angle changes throughout the year, so does the time of sunset. In the summer, when the declination angle is higher, sunset will occur later in the day compared to winter when the declination angle is lower.

5. Can sunset local time be calculated accurately for any location?

Yes, sunset local time can be calculated accurately for any location on Earth as long as the latitude and longitude are known. However, other factors such as weather conditions and atmospheric refraction may slightly affect the actual time of sunset.

Similar threads

I Help with Sunrise & Sunset formulas please
    • Astronomy and Astrophysics
Replies
6
Views
1K
I Calculation of the hour angle of the Sun
    • Astronomy and Astrophysics
Replies
1
Views
4K
Direction (bearing) of sunrise/sunset
    • Earth Sciences
Replies
25
Views
2K
I Calculation of daily solar insolation
    • Astronomy and Astrophysics
Replies
6
Views
2K
I Can we predict the path of the Sun from a single observation point along the transit?
    • Astronomy and Astrophysics
Replies
12
Views
1K
Which Star Does the Moon Occult on December 23-24, 2015?
    • Introductory Physics Homework Help
Replies
2
Views
873
Calculating sunrise/sunset times
    • Earth Sciences
Replies
4
Views
4K
Variations between Sunrise & Sunset timings
    • Astronomy and Astrophysics
Replies
5
Views
3K
Astronomy: Sun azimuth from altitude, hour angle, and declination
    • Introductory Physics Homework Help
Replies
3
Views
2K
History Could an Eight-Part Year Have Existed in Ancient Northern Europe?
    • Art, Music, History, and Linguistics
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top