- The structure is built using 0.8mm and 1.0mm brass wire.
- The local sidereal time (LST) is calculated using this algorithm: http://www.stargazing.net/kepler/altaz.html
- The Lunar Phase is calculated using John Conway's moon age algorithm.
- More details and the explanations of the algorithms are available in the instructions tab.
How to use this clock:
The Local Sidereal Time(LST) is defined as the time reckoned from the motion of the earth relative to the stars. It is 0h when the vernal equinox is on the observer's local meridian.
When you look at a stargazing chart you'll see 2 celestial coordinates the Right Ascension (RA) and Declination (DEC). the RA of star X is the angular distance from the vernal equinox to X = 1h = LST. The DEC value is 0 when on the horizon and 90 when on the top. Thus if a star has a RA=3h and DEC=30 it will be on your meridian 30 degrees up from the horizon when the LST clock is 3h.
Celestial Sphere - http://www.astronomyforbeginners.com/astronomy/cel...
Coordinate Systems - https://dept.astro.lsa.umich.edu/ugactivities/Labs...
Celestial Coordinates - http://sbo.colorado.edu/SBO_OLD_SITE/sbo/astroinfo...
Finding Astronomical Objects - https://www.saddleback.edu/faculty/mhaeri/document...
Local Side Real Clock converter - http://www.jgiesen.de/astro/astroJS/siderealClock/
How to Calculate Sidereal time - http://aa.usno.navy.mil/faq/docs/GAST.php