|_||Astrophysical Institute Neunhof|
A file with Excel-macros, which convert the calendar date to the Julian date, and the Julian date to the calendar date.
Last update: Dec-18-2009
→ File download ( Excel, 55 KB )
Constants and Conversion Factors
This is an Excel file with the most frequently needed constants of nature, and with factors for the conversion between different unit systems. Advantage: For fast computations of simple formulas, you don't need to key-in again and again the same lengthly numerical values of these constants.
Last update: September-09-2015
→ File download ( Excel, 25 KB )
Coordinate-Translations and -Rotations
A file with Excel-macros, which compute arbitrary rotations and translations of coordinates. Furthermore macros, which convert spherical coordinates to cartesian coordinates, and cartesian coordinates to spherical coordinates.
These macros are useful e.g. for conversion inbetween equatorial coordinates, ecliptical coordinates, and horizontal coordinates.
Last update: Mar-19-2015
→ File download ( Excel, 373 KB )