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Rules for choosing alignment stars
Rules from Skywatcher :
Rules for choosing alignment stars:
• It is recommended that the altitude (angle of elevation above a theoretical flat horizon) of the two alignment stars are between 15 and 60 degrees and the difference in altitude between them is between 10 and 30 degrees.
• The azimuth (Compass direction) difference between the two alignment stars can be between 45 and 135 degrees, BUT it is best to be close to 90 degrees.
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