No internet connection, no up- or downloads, no usage of your position data, no advertising or anything the like. The source of the data is the Bright Star Catalog of 2017 and Jet Propulsion Laboratory’s DE241 development ephemeris.įor calculation, the software package NOVAS C3.1 from U.S.
Celestial navigation calculator for sale full#
Calculate and display, in textual form, Greenwich hour angle, declination, height computed and azimuth of the 57 navigational stars as listed in the Nautical Almanac, the four navigational planets, Venus, Mars, Jupiter and Saturn, the Sun and the Moon.Īdditional full data is shown for Polaris and the GHA of Aries.Īdditionally, calculated and displayed are corrections, that is refraction, apparent semidiameter, parallax, and the sum of these for aiding in correcting sights of the bodies taken by a sextant.ĭata is calculated for arbitrary assumed position on earth that can be entered as latitude and longitude in units of degrees, arcminutes and tenth of arcminute.Īll positional data is displayed as degrees, arcminutes, and tenth of arcminutes.ĭata is shown, except for Aries, if the respective body is above the horizon, regardless of the usability for observation.ĭata is calculated for current system time what is converted and displayed as universal time.Īrrangement of data is to match closely that found on (external link) and the notes given there mostly apply to this app.