Episode 219In this episode of the Observers Notebook podcast, host Tim Robertson talks to Bob Lunsford about his process for observing and photographing the recent transits of Saturn’s moon Titan.Titan’s Orbit and Motion:• Orbital period around Saturn: ~15.945 Earth days• Average distance from Saturn: ~1.22 million km• Orbital inclination: ~0.3° relative to Saturn’s equator (small, so Titan’s path is nearly aligned with Saturn’s rings).• Apparent size: ~0.8 arcseconds (tiny, only detectable as a “point” in most telescopes).• Shadow transits are possible only when Saturn’s rings are edge-on (every ~15 years).• September 20, 2025 — Start around • After October 5–6, 2025, this spectacular phenomenon won’t happen again until 2038–2039.You can contact Bob at:[email protected]Stellariumhttps://stellarium.org/For more information you can visit the ALPO web site at:www.alpo-astronomy.org/You can also support this podcast at Patreon:https://www.patreon.com/ObserversNotebookListen to the podcast on Soundcloud:https://soundcloud.com/observersnotebookSubscribe on our YouTube Channel:https://www.youtube.com/c/AssociationofLunarandPlanetaryObserversSubscribe on iTunes:https://itunes.apple.com/us/podcast/observers-notebook-the-alpo-podcast/id1199301885?mt=2I want to thank the Producers of this podcast, Steve Siedentop and Michael Moyer for their generous support of the Observers Notebook.Our Patreons:Jerry WhiteJason InmanBob LunsfordSteve SeidentopStephen BennettMichael MoyerShawn DillesDamian AllisCarl HergenrotherMichael McShanMichael BlakeNick EvettsStan SienkiewiczCarl HergenrotherStan SienkiewiczJohn RogersJim McCarthyStanley McMahan