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observing aids

Title Posted By Updated/commented date Typesort icon
Julian Date (JD) Calculator and Calendars BSJ 11 weeks 6 days ago Page
AAVSO Bulletin Generator Matthew Templeton 3 years 3 days ago Page
New Chinese Visual Observing Manual BSJ 2 years 11 weeks ago Page
Visual Observing Manual - Chinese BSJ 2 years 12 weeks ago Page
2011 JD Calendar BSJ 4 years 11 weeks ago Page
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