Jupiter: Ganymede shadow transit tonight

[Mark Wagner]

Thought I'd post this heads-up.  21:43 Ganymede ingress transit followed 21:48 by it's shadow.  Planet rising.

If you're homebound like me tonight and looking for a little astro.

Setting up the ten.

Mark

[Rajah]

Thanks for the heads up Mark, I will set up my DOB.

--
Observing Sites, Observing Reports, About TAC linked at top of:
https://groups.google.com/forum/#!forum/sf-bay-tac
 
Subscribers post to the mailing list at:
 
sf-ba...@googlegroups.com,
---
You received this message because you are subscribed to the Google Groups "The Astronomy Connection (TAC)" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sf-bay-tac+...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/sf-bay-tac/CAG72LjB8KBXqpvNYmQO6OE3rD01F7ZWZSrjytJmosk3RHeO5EA%40mail.gmail.com.

[Ted Hauter]

Sky Safari also has moon orientation to look for those details ...

To view this discussion visit https://groups.google.com/d/msgid/sf-bay-tac/CAGwcBa%2B9%3DPkf5g%3DbBMk7p0GDHqH-8xK_bYywOOWo20VudPNh9Q%40mail.gmail.com.

[Francesco Meschia]

On Jupiter, waiting for the transit to begin. Seeing is 5/5 here in Mountain View.

Francesco 

Sent from my iPhone

On Jan 13, 2026, at 13:47, Ted Hauter <thgo...@gmail.com> wrote:



<1000025046.jpg>

To view this discussion visit https://groups.google.com/d/msgid/sf-bay-tac/CAL-cFaFcq6t3Twsi2P%3DJp-O1m8px7ez_RBJH5MG85LA4ByRtNQ%40mail.gmail.com.

[Francesco Meschia]

First detection of the shadow!

Sent from my iPhone

On Jan 13, 2026, at 21:37, Francesco Meschia <francesc...@gmail.com> wrote:

On Jupiter, waiting for the transit to begin. Seeing is 5/5 here in Mountain View.

[Francesco Meschia]

Shadow now fully detached from the planet’s limb.

Sent from my iPhone

On Jan 13, 2026, at 22:00, Francesco Meschia <francesc...@gmail.com> wrote:

First detection of the shadow!

[Joel Lee]

Seeing here in my backyard in Fremont is better than previous days but Jupiter's bands look like a wavepool and the planet is jiggling like jello. I'm super oversampled for the seeing but you can start to see Ganymede's shadow and the GRS. 

To view this discussion visit https://groups.google.com/d/msgid/sf-bay-tac/1BB80BF2-A1A7-4FF4-AAFE-5BD3516CD363%40gmail.com.

[Philip Manela]

Looking good in Saratoga backyard also.  

Sent from my iPhone

On Jan 13, 2026, at 10:13 PM, Joel Lee <joel.l...@gmail.com> wrote:



To view this discussion visit https://groups.google.com/d/msgid/sf-bay-tac/CAEawR1M8duSEHAOavk64UE58cuhsWCZ%3D_EipG8DscNyEkStAjA%40mail.gmail.com.

<Screenshot 2026-01-13 at 22.11.03.png>

[Francesco Meschia]

Very, very neat. I can see both the shadow and Ganymede in front of Jupiter. The moon itself is subtle, but it’s there.

Sent from my iPhone

On Jan 13, 2026, at 22:08, Francesco Meschia <francesc...@gmail.com> wrote:

Shadow now fully detached from the planet’s limb.

[Philip Manela]

Visible 100% of the time now as a crisp black dot. 

Sent from my iPhone

On Jan 13, 2026, at 10:18 PM, Philip Manela <philip...@gmail.com> wrote:

Looking good in Saratoga backyard also.  

[Ted Hauter]

Not the seeing from last night but enjoyed!

To view this discussion visit https://groups.google.com/d/msgid/sf-bay-tac/258A3890-8C60-447A-A611-8B9A68F070EB%40gmail.com.

[Mark Wagner]

Excellent seeing here last night.  Watched as long as I could, the brrrr factor finally worked against me.

Amazes that last night's moon and shadow transits had ingress five minutes apart but egress about 45 minutes apart. I like using 90's era TACo Akkana Peck's easy to use prediction program Gallilean to catch these events.

[Steve Gottlieb]

Seeing was only average at best from the dark site I’m at, but the shadow was a sharp black disc and Ganymede itself was easily visible, though less contrast.  The GRS was seen as a salmon-colored oval. Using an 8” off-axis mask on my 24” to not blow out my night vision. 

-- Steve

On Jan 13, 2026, at 10:27 PM, Philip Manela <philip...@gmail.com> wrote:

Visible 100% of the time now as a crisp black dot. 

To view this discussion visit https://groups.google.com/d/msgid/sf-bay-tac/258A3890-8C60-447A-A611-8B9A68F070EB%40gmail.com.

[Ted Hauter]

f30 there 🤩

To view this discussion visit https://groups.google.com/d/msgid/sf-bay-tac/59227D78-40AE-4D17-B8F7-91B8B216B4D4%40comcast.net.