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AAVSO Finder charts

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  1. AAVSO Finder charts Janet A. Mattei AAVSO

  2. Finder chartsN • Road maps for navigating in the sky • Essential for locating objects Longitude - Right ascension (RA)

  3. Finder chartsfor variable stars • The AAVSO has finder charts (charts in short) for over 5000 variable stars of all types • All charts are accessible and downloadable from the AAVSO website at: http://www.aavso.org/observing/charts and on Variable Star Charts CD Latitude Longitude - Right ascension (RA)

  4. Observing with AAVSO charts • Let’s try observing RR Bootes

  5. Finder chart for Bootis region

  6. scale These types of charts are for telescopes with even number of optical surfaces, such as Newtonian telescopes Comparison star

  7. Reversed Chart - for telescopes with odd number of optical surfaces, when using star diagonals, such as refractors and Schmidt-Cassegrain type telescopes (Celestron and Meades)

  8. scale Another scale Indicator – ½ degree (diameter of the Moon)

  9. Reversed chart

  10. Special charts for CCD observing with B,V,R,I filters Colums indicate precisely measured magnitudes of comparison stars with B,V,R,I filters