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Using the ETX-90 Astro Telescope | |||||
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Steps for Observing:
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How to Point the Telescope Orient the ETX so that the "bottom" leg points toward the South. That "bottom" leg should be adjusted to the current latitude. Iowa-Minnesota border is 43.5°, the halfway point, US-30 is at 42° and the Iowa-Missouri border is about 40.6°. An error of a degree is no big deal. The simplest way to point a telescope is with a simple device such as the finder scope or one of the "bulls-eye" finders such as the Telrad®.
The stars in the constellations serve as "guide posts" for finding the deep sky objects. Star hopping is the term given to this most common way to find your way around the sky. Once a known object is being viewed through the telescope, the setting circles may be set to the correct Right Ascension and Declination. Note--Declination is automatically correct if the telescope is oriented correctly, so you need only to adjust the Right Ascension tape. Once this is done, celestial objects may be found from their coordinates. You will need the LED (light emitting diode) flashlight to see the numbers!
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© Copyright 2000, 2002 - Samuel J. Wormley - Educational Observatory Institute, Inc.
All rights reserved. swormley1@gmail.com