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Celestaire Astra IIIB Sextant

  • Mirror Type: Whole
  • Frame Material: Lightweight Aluminum Alloy
  • The Most Recognized and Supported Sextant Worldwide
  • Item #: 
    Model #: 

    0501 D

    Shipping Weight: 
    8.20 Lbs.
    Status:    null In Stock

    Quantity : 


    The Astra IIIB has somewhat revolutionized celestial navigation. Never before has such a high quality, accurate metal sextant been available at such a low price. Over 23,000 sextants of this model have been sold in the US alone in the past 26 years, far more than any other serious sextant. Its popularity has spread throughout the rest of the world as well, making it the the most recognized (and supported) sextant worldwide.

    Its low price, excellent optics and choice of horizon mirrors and other accessories makes it the perfect selection for beginners. Yet, we know several professional navigators who prefer the ASTRA IIIB merely because they can leave their expensive models at home without sacrificing noticeable accuracy.


    • Ability to quickly and economically change the type of horizon mirror
    • Inexpensive replacement parts aids maintainability when students mishandle the sextant
    • LED lighting of the arc and drum (powered by 2 AA batteries - not included)
    • Varnished wooden case
    • Instruction book included
    • Adjusting wrench included
    • Certificate of accuracy

    Arc -5° + 130° - radius 6" (153mm)
    Accuracy ± 20° throughout the arc
    Micrometer Drum 1' scale - vernier to 0.1'
    Mirror Configuration Whole
    Horizon Mirror 2" (51mm) diameter
    Index Mirrors 2.2" x 1.65" (56mm x 42mm)
    Shades 4 index - 3 horizon
    Weight 2 lbs, 10 oz
    Case Dimensions 6.5" x 13" x 11"



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