Sangamon Astronomical Society
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The Sangamon Astronomical Society is a registered not-for-profit organization dedicated to raising the public’s awareness about the science of astronomy and to increasing the interest of astronomical science to education in the Springfield area. We aim our telescopes and intentions on developing friendships based upon a hobby that engages the mind and raises the appreciation of the universe around us.
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Circumpolar Stars
Some stars never set, others never rise
Stars between the celestial equator and the Zenith are above the horizon for more than 12 hours.
Stars on the celestial equator are above the horizon for 12 hours.
Stars between the celestial equator and the declination at geographic south are above the horizon for less than 12 hours.
Stars farther south than "90º minus your latitude" are circumpolar south and never rise.
Declination of the zenith equals your latitude
Stars farther north than your latitude (i.e., zenith declination) are circumpolar north and never set.
Polaris' altitude in degrees equals your latitude
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Springfield, IL
62791
