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observing aids

Title Posted By Updated/commented date Typesort icon
Program stars in need of observation Matthew Templeton 49 weeks 1 day ago Page
SID Monitoring Group FAQ Matthew Templeton 3 years 23 weeks ago Page
2013 JD Calendar BSJ 2 years 51 weeks ago Page
Visual Observing Manual - Turkish BSJ 2 years 4 days ago Page
Accuracy and Consistency in the Production of the American Sunspot Number (Ra) Matthew Templeton 2 years 5 days ago Page
AAVSO Bulletin 75 for 2012 weo 2 years 39 weeks ago Page
Visual Observing Manual - French BSJ 2 years 24 weeks ago Page
AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484