Io and shadow transit

[Francesco Meschia]

PSA: A transit of both Io and its shadow on the face if Jupiter is currently in progress.

Francesco
Sent from my iPhone

[Richard Navarrete]

Totally cloudy here. ☹️

Richard

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[Ted Hauter]

Rare clouds in Paso. Dang!

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[David Kirjassoff]

Same

[Ted Hauter]

Tonight is iffy but the scope will be out after amazing solar morning.

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[Francesco Meschia]

Between one cloud and the next one, the GRS near meridian is always a nice sight!

Sent from my iPhone

On Feb 28, 2026, at 18:26, Ted Hauter <thgo...@gmail.com> wrote:



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[Francesco Meschia]

Interestingly, I can see Callisto, which has just started its transit. I mean the satellite, not its shadow: its albedo must be significantly lower than Jupiter’s.

Sent from my iPhone

On Feb 28, 2026, at 19:27, Francesco Meschia <francesc...@gmail.com> wrote:

Between one cloud and the next one, the GRS near meridian is always a nice sight!

[Richard Navarrete]

And a shadow transit !

Richard

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.

[Francesco Meschia]

Also very interesting was the sudden appearing of Io from the shadow of Jupiter.

I couldn’t resist the temptation to snap an iPhone picture of what the eyepiece was showing:

Sent from my iPhone

On Feb 28, 2026, at 19:38, Francesco Meschia <francesc...@gmail.com> wrote:

Interestingly, I can see Callisto, which has just started its transit. I mean the satellite, not its shadow: its albedo must be significantly lower than Jupiter’s.

[Francesco Meschia]

I don’t think there’s a shadow transit right now; the next one should be Callisto’s tomorrow morning.

Sent from my iPhone

On Feb 28, 2026, at 19:51, 'Richard Navarrete' via The Astronomy Connection (TAC) <sf-ba...@googlegroups.com> wrote:

 And a shadow transit !

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[Francesco Meschia]

Callisto (in transit now) looks much darker than the planet, to the point that it can be taken for a shadow. This is the situation right now:

[Richard Navarrete]

Ain’t TAC great! Thanks for the correction, in real time!

Richard

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[Ted Hauter]

Excellent Jupiter in good seeing last night with Callisto near the ever storming Great Red Spot (Getting larger??)

Getting collimation perfected with Tak collimation tool / high power eyepiece just to be sure fine details not being missed. 

One eye I've got too many floaters (too much solar?) Back to binoviewing with my favorite Ice 80A.

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[Francesco Meschia]

Agreed – Jupiter with the GRS and Callisto was a real treat. Especially if one considers that it had been cloudy most of the day here.

After shutting down the telescope for the night, I also captured a nice Moon ring over Cancer and Leo:

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[Ted Hauter]

Nice lunar halo 👍

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[Francesco Meschia]

Thanks!

Tonight’s PSA: the GRS has just become visible. Tonight it will take center stage.

On Mar 1, 2026, at 13:58, Ted Hauter <thgo...@gmail.com> wrote:

Nice lunar halo 👍

On Sun, Mar 1, 2026, 12:05 PM Francesco Meschia <francesc...@gmail.com> wrote:

Agreed – Jupiter with the GRS and Callisto was a real treat. Especially if one considers that it had been cloudy most of the day here.

After shutting down the telescope for the night, I also captured a nice Moon ring over Cancer and Leo:

<57083A35-88AC-4DF2-916B-343396D8D705-IMG_0436.jpeg>

On Mar 1, 2026, at 06:22, Ted Hauter <thgo...@gmail.com> wrote:

Excellent Jupiter in good seeing last night with Callisto near the ever storming Great Red Spot (Getting larger??)

Getting collimation perfected with Tak collimation tool / high power eyepiece just to be sure fine details not being missed. 

One eye I've got too many floaters (too much solar?) Back to binoviewing with my favorite Ice 80A.

On Sat, Feb 28, 2026, 8:20 PM 'Richard Navarrete' via The Astronomy Connection (TAC) <sf-ba...@googlegroups.com> wrote:

Ain’t TAC great! Thanks for the correction, in real time!

Richard

Sent from the all new AOL app for iOS

On Saturday, February 28, 2026, 8:01 PM, Francesco Meschia <francesc...@gmail.com> wrote:

Callisto (in transit now) looks much darker than the planet, to the point that it can be taken for a shadow. This is the situation right now:

<PastedGraphic-1.png>

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<PastedGraphic-1.png><57083A35-88AC-4DF2-916B-343396D8D705-IMG_0436.jpeg><57083A35-88AC-4DF2-916B-343396D8D705-IMG_0436.jpeg><PastedGraphic-1.png><PastedGraphic-1.png>

[Ted Hauter]

Thank you Francisco.

Center stage for sure!

A tough lunar eclipse 😉

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[Ted Hauter]

Francesco!

[Francesco Meschia]

Yeah, the weather forecast for the eclipse is not great. But I’m happy that I was able to take a reasonable picture of Jupiter with a nicely prominent GRS:

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[David Kirjassoff]

Excellent work Francisco!  Very much like it looked in my eyepiece but my planetary astrophotography aren’t very good. 

Sent from my iPad

On Mar 2, 2026, at 10:03 PM, Francesco Meschia <francesc...@gmail.com> wrote:

Yeah, the weather forecast for the eclipse is not great. But I’m happy that I was able to take a reasonable picture of Jupiter with a nicely prominent GRS:

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[Ted Hauter]

Awesome Francesco!

That made my night.

Only the Washington coast, of all places saw that eclipse 🥲😆

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[Francesco Meschia]

Seeing is not great tonight in Mountain View, but a transit of the shadow of Europa is currently in progress. The shadow can be seen just south of the GRS.

Francesco

On Mar 3, 2026, at 07:08, Ted Hauter <thgo...@gmail.com> wrote:

Awesome Francesco!

That made my night.

Only the Washington coast, of all places saw that eclipse 🥲😆

<1000026652.jpg>

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