|Home Page | The Sun API | Gallery | InfoSearch | News | Links | Contact Us|
+ Using the Functions
+ User Guide
+ Function Reference
DescriptionReturns the Solar Declination in degrees for a given point in time.
Time Value Formats
All MJD and SDY values are expressed in UT. A <TimeZone> appended to the time value is informational only and doesn't affect the time value.
sdxDecl returns a double precision number. Solar Declination varies on an annual cycle. The minimum value is approximately -23.5, the maximum +23.5 degrees. A negative number indicates that the sun is South with respect to the equator.
Solar Declination is calculated using algorithms published in Meeus, Jean. "Astronomical Algorithms" 2nd Ed., Willmann-Bell.
It is not meaningful to convert a declination in degrees into a time unit using the sdD2Unit function.
What is the Solar Declination at MJD 52448.125 (3am UT, June
23rd, 2002) :
What is the Solar Declination at 6am, 21st January, 2001
What is the Solar Declination for the point on a projection
sundial to show 6am, 21st January in Amsterdam?:
|(c) 2001-2014 Sunlit Design www.sunlit-design.com Fri, 07 Mar 2014 08:13:08 PM +700 gives UT|