Webinar
- How to plan observing of eclipsing binaries when ephemerides are out of date - presented by Bob Buchheim, Gary Billings, Eric Dose, Sebastian Otero, Bert Pablo, and Gerry Samolyk. April 15, 2020. Supporting document: LessObsdEBs_revisedJuly2020.pdf
Other Presentations
- Powerpoint Document on "How To Make O-C Diagrams" from Gary Billings' talk at the AAVSO Annual Meeting - 2019