For security reasons, your text input is no longer repeated in the form above.
All input coordinates are in DEGREES.
The "Coordinate Format" element controls both input and output formats. If
"Deg:Min:Sec" is selected, both input coordinates must be in this format.
Epochs should be entered as a number: 2000 or 1950. FK5 precession coefficients are used,
as specified in the "Astronomical Almanac Explanatory Supplement", 1992, p104, Table 3.211.1.
A small error creeps into the calculations when working with epochs earlier than
1550; this error increases as the epoch becomes earlier. At J0000, this error is
about 2.2 arcseconds. It can be illustrated by entering RA/DEC of 0,0 and setting
both the input and output epochs to zero; in this case, the RA/Dec and Ecliptic
Long/Lat should all be zero but are not.