Astrotime by Bob Nelson, is a small downloadable application that produces a wealth of time-related outputs from input data including your location, time, star RA and Dec. Outputs are RA/Dec conversion to another epoch, JD, HJD correction, local sidereal time, alt/az coordinates, airmass, hour angle, constellation, galactic coordinates, Sun’s RA/Dec, and sunrise/sunset.

Software by Bob Nelson