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    Manufacturer: Cassens & Plath

    Starfinder

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    SKU: JG_552

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    Concept of the U.S. Naval Oceanographic Office. Shows graphically the positions of the 57 select stars of the nautical almanach. The variable positions of sun, moon and planets can be marked separately. Consists of a double sided base plate for north/south hemisphere, nine transparent altitude azimuth templates for 10 intervals of latitude, transparent meridian diagram and English instruction sheet. Stored in a sturdy plastic bag.

    Why Starglobe or Starfinder?

    Starglobe and starfinder are used  to convert alternately celestial to horizontal coordinates of a star. Question: Where is this or that star now at my position? The celestial coordinates: local hour angle and declination are found in the nautical almanach. Adjust starglobe or finder accordingly. Now read the horizontal coordinates: azimuth or direction and height of the star. Conversely the celestial coordinates and name of the unknown star can be conclued from azimuth and height:

    This simplifes astro navigation with the sextant:
    • Observing an unknow star between cloud snatches. Sextant height and approximate direction can be with them the name of the star to calculate a line of position.
    • The planet Venus is invisible in the daytime. Use starglobe or finder to determinate direction and height. Now Venus will appear when observing through the sextant telescope. Also many navigational calculators include easy to use programs to solve these problems.

    Catálogo

    Concept of the U.S. Naval Oceanographic Office. Shows graphically the positions of the 57 select stars of the nautical almanach. The variable positions of sun, moon and planets can be marked separately. Consists of a double sided base plate for north/south hemisphere, nine transparent altitude azimuth templates for 10 intervals of latitude, transparent meridian diagram and English instruction sheet. Stored in a sturdy plastic bag.

    Why Starglobe or Starfinder?

    Starglobe and starfinder are used  to convert alternately celestial to horizontal coordinates of a star. Question: Where is this or that star now at my position? The celestial coordinates: local hour angle and declination are found in the nautical almanach. Adjust starglobe or finder accordingly. Now read the horizontal coordinates: azimuth or direction and height of the star. Conversely the celestial coordinates and name of the unknown star can be conclued from azimuth and height:

    This simplifes astro navigation with the sextant:
    • Observing an unknow star between cloud snatches. Sextant height and approximate direction can be with them the name of the star to calculate a line of position.
    • The planet Venus is invisible in the daytime. Use starglobe or finder to determinate direction and height. Now Venus will appear when observing through the sextant telescope. Also many navigational calculators include easy to use programs to solve these problems.

    Catálogo

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