|
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