
GeoAstro Applets 
Astronomy 
Chaos Game 
Java 
Miscel laneous 
Altitude and Azimuth of the Sun and the Moon
Web: http://www.geoastro.de/altazsunmoon/

Select a location from the menu list, 

Look up your coordinates: enter longitude (decimal degrees, eastern positive,
western negative) into the
text field of the applet, and press Apply input.


Find the time zone (and coordinates) of cities worldwide: The World Clock Interactive time zone map of countries around the world. 

You may use the keys "m", "d", "h", "n" to increase the month, date, hour, or
minute, 

Solar and lunar data are computed for one day. 
The longitude of the Sun is
computed to an accuracy of 0.01°, assuming a purely
elliptical motion of the Earth, and neglecting the
perturbations by the Moon and the planets. The resulting accuracy of right ascension is about 0.01°, and of declination is about 0.004°. 
To get this data window select "Write Day" from the menu: The elevation angles of the Moon are corrected for parallax and atmospheric refraction, which is bending the light while passing through the Earth's atmosphere. 
How to
compute the position of the Sun
(Basics of positional astronomy)
How to compute the position of the Moon
"Instrument Buch" of Petrus Apianus, 1533
from Bruno H. Bürgel: Aus fernen Welten, 1920
Last
Modified:
2023, Oct 05