Episode 226
In this episode, we’re turning our eyes toward some of the most dynamic travelers in our solar system — comets — and looking ahead to what promises to be an exciting year in the night sky: 2026.
Each year brings a new lineup of these icy visitors, and with them, the chance for both amateur and professional observers to witness spectacular changes as they approach the Sun and develop tails of gas and dust. But which comets will stand out in 2026? Which ones might become visible to the naked eye — and which could surprise us?
To help answer those questions, I’m joined by Carl Hergenrother, Coordinator of the ALPO Comets Section and a veteran comet discoverer himself — yes, he even has one named after him, Comet 168P/Hergenrother. Carl has spent decades studying, imaging, and analyzing comets from both professional observatories and backyard telescopes.
Together, we’ll explore which comets are expected to light up the sky in 2026, how to observe them, and what role amateur astronomers can play in monitoring these fascinating objects.
So grab your star charts, check your observing gear, and get ready — we’re about to dive into “Comets of 2026” with Carl Hergenrother.
You can contact Carl at:
carlhergenrother@gmail.com
ALPO Comets Section
https://www.alpo-astronomy.org/Comets
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/ObserversNotebook
Listen to the podcast on Soundcloud:
https://soundcloud.com/observersnotebook
Subscribe on our YouTube Channel:
https://www.youtube.com/c/AssociationofLunarandPlanetaryObservers
Subscribe on iTunes:
https://itunes.apple.com/us/podcast/observers-notebook-the-alpo-podcast/id1199301885?mt=2
I want to thank the Producers of this podcast, Steve Siedentop and Michael Moyer for their generous support of the Observers Notebook.
Our Patreons:
Jerry White
Jason Inman
Bob Lunsford
Steve Seidentop
Stephen Bennett
Michael Moyer
Shawn Dilles
Damian Allis
Carl Hergenrother
Michael McShan
Michael Blake
Nick Evetts
Stan Sienkiewicz
Carl Hergenrother
Stan Sienkiewicz
John Rogers
Jim McCarthy
Stanley McMahan
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Episode 226
In this episode, we’re turning our eyes toward some of the most dynamic travelers in our solar system — comets — and looking ahead to what promises to be an exciting year in the night sky: 2026.
Each year brings a new lineup of these icy visitors, and with them, the chance for both amateur and professional observers to witness spectacular changes as they approach the Sun and develop tails of gas and dust. But which comets will stand out in 2026? Which ones might become visible to the naked eye — and which could surprise us?
To help answer those questions, I’m joined by Carl Hergenrother, Coordinator of the ALPO Comets Section and a veteran comet discoverer himself — yes, he even has one named after him, Comet 168P/Hergenrother. Carl has spent decades studying, imaging, and analyzing comets from both professional observatories and backyard telescopes.
Together, we’ll explore which comets are expected to light up the sky in 2026, how to observe them, and what role amateur astronomers can play in monitoring these fascinating objects.
So grab your star charts, check your observing gear, and get ready — we’re about to dive into “Comets of 2026” with Carl Hergenrother.
You can contact Carl at:
carlhergenrother@gmail.com
ALPO Comets Section
https://www.alpo-astronomy.org/Comets
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/ObserversNotebook
Listen to the podcast on Soundcloud:
https://soundcloud.com/observersnotebook
Subscribe on our YouTube Channel:
https://www.youtube.com/c/AssociationofLunarandPlanetaryObservers
Subscribe on iTunes:
https://itunes.apple.com/us/podcast/observers-notebook-the-alpo-podcast/id1199301885?mt=2
I want to thank the Producers of this podcast, Steve Siedentop and Michael Moyer for their generous support of the Observers Notebook.
Our Patreons:
Jerry White
Jason Inman
Bob Lunsford
Steve Seidentop
Stephen Bennett
Michael Moyer
Shawn Dilles
Damian Allis
Carl Hergenrother
Michael McShan
Michael Blake
Nick Evetts
Stan Sienkiewicz
Carl Hergenrother
Stan Sienkiewicz
John Rogers
Jim McCarthy
Stanley McMahan
Episode 219
In 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 5:09 AM UTC (≈10:09 PM PDT); ends ~7:34 AM UTC (~12:34 AM PDT); Titan may also be visible near its shadow.
• After October 5–6, 2025, this spectacular phenomenon won’t happen again until 2038–2039.
You can contact Bob at:
lunro.imo.usa@cox.net
Stellarium
https://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/ObserversNotebook
Listen to the podcast on Soundcloud:
https://soundcloud.com/observersnotebook
Subscribe on our YouTube Channel:
https://www.youtube.com/c/AssociationofLunarandPlanetaryObservers
Subscribe on iTunes:
https://itunes.apple.com/us/podcast/observers-notebook-the-alpo-podcast/id1199301885?mt=2
I want to thank the Producers of this podcast, Steve Siedentop and Michael Moyer for their generous support of the Observers Notebook.
Our Patreons:
Jerry White
Jason Inman
Bob Lunsford
Steve Seidentop
Stephen Bennett
Michael Moyer
Shawn Dilles
Damian Allis
Carl Hergenrother
Michael McShan
Michael Blake
Nick Evetts
Stan Sienkiewicz
Carl Hergenrother
Stan Sienkiewicz
John Rogers
Jim McCarthy
Stanley McMahan
Observers Notebook
Episode 226
In this episode, we’re turning our eyes toward some of the most dynamic travelers in our solar system — comets — and looking ahead to what promises to be an exciting year in the night sky: 2026.
Each year brings a new lineup of these icy visitors, and with them, the chance for both amateur and professional observers to witness spectacular changes as they approach the Sun and develop tails of gas and dust. But which comets will stand out in 2026? Which ones might become visible to the naked eye — and which could surprise us?
To help answer those questions, I’m joined by Carl Hergenrother, Coordinator of the ALPO Comets Section and a veteran comet discoverer himself — yes, he even has one named after him, Comet 168P/Hergenrother. Carl has spent decades studying, imaging, and analyzing comets from both professional observatories and backyard telescopes.
Together, we’ll explore which comets are expected to light up the sky in 2026, how to observe them, and what role amateur astronomers can play in monitoring these fascinating objects.
So grab your star charts, check your observing gear, and get ready — we’re about to dive into “Comets of 2026” with Carl Hergenrother.
You can contact Carl at:
carlhergenrother@gmail.com
ALPO Comets Section
https://www.alpo-astronomy.org/Comets
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/ObserversNotebook
Listen to the podcast on Soundcloud:
https://soundcloud.com/observersnotebook
Subscribe on our YouTube Channel:
https://www.youtube.com/c/AssociationofLunarandPlanetaryObservers
Subscribe on iTunes:
https://itunes.apple.com/us/podcast/observers-notebook-the-alpo-podcast/id1199301885?mt=2
I want to thank the Producers of this podcast, Steve Siedentop and Michael Moyer for their generous support of the Observers Notebook.
Our Patreons:
Jerry White
Jason Inman
Bob Lunsford
Steve Seidentop
Stephen Bennett
Michael Moyer
Shawn Dilles
Damian Allis
Carl Hergenrother
Michael McShan
Michael Blake
Nick Evetts
Stan Sienkiewicz
Carl Hergenrother
Stan Sienkiewicz
John Rogers
Jim McCarthy
Stanley McMahan