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Jupiter with only one Galilean moon visible 03/26

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#1 ericj

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Posted 24 March 2013 - 04:36 PM

Hi,

On Tuesday evening, March 26th, 2013, in the Eastern portion on North America, only one Galilean moon will be visible staring at 8:41 PM.

Here are the approximate times of the satellite events. Note they were generated for the Northeastern portion on North America so the time maybe be different for you depending upon your observing location.

7:47 PM Ganymede (III) Occultation disappearance

8:20 PM Europa (II) Transit start

8:41 PM Io (I) Occultation disappearance

10:12 PM Ganymede (III) Occultation reappearance

10:43 PM Europa (II) Shadow transit start

10:48 PM Europa (II) Transit end

12:04 AM Io (I) Eclipse reappearance

I observed this event once before in August of 1976, although in that case I did not have an advanced warning. I had set up my Criterion RV-6 reflector to observe Jupiter and was surprised to see that only one moon was visible. I have often wondered since then if I would get the chance to observe this event again.

Note that Jupiter with only one Galilean moon visible will occur again on April 3rd, 2013 at 12:03 AM for all of North America except the East.

Clear Skies,

Eric Jamison

#2 nirvanix

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Posted 25 March 2013 - 06:15 AM

Thanks for the info. Another fine show in store from the king.

#3 ericj

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Posted 25 March 2013 - 10:38 AM

Hi Richard,

Thanks.

Note that Jupiter with only one Galilean moon visible will occur again on April 3rd, 2013 at 12:03 AM for all of North America except the East.

Best,

Eric

#4 Astrodj

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Posted 26 March 2013 - 03:58 PM

Thanks Eric, for the notice. It looks like the skies here will cooperate well enough to get a look at this tonight.

#5 bryguy27007

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Posted 26 March 2013 - 05:10 PM

Looks like we'll have our first clear night in a while here as well. Excited to give this a look.

#6 nirvanix

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Posted 27 March 2013 - 08:38 AM

I caught this show last night. It was a marvelous night for a moondance!

#7 Darren Drake

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Posted 27 March 2013 - 11:23 AM

Several years ago I saw Jup with no moons visible. Won't happen again for several more years.

#8 ericj

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Posted 07 April 2013 - 10:23 AM

Your welcome Astrodj hope you were able to observe it.

I set up the TMB 105mm (4.1") f/6.2 on its alt-az mount to observe Jupiter that night.

Unfortunately while the sky was clear the seeing was mostly fair at best, and a westerly breeze picked up from time to time that also degraded the seeing.

So this made it difficult to observe Ganymede as it disappeared into occultation, and I was only able to catch a quick look at Io before it disappeared. The same held true for start of the Europa shadow transit. By the time they were to reappear Jupiter had slid behind the trees from my observing location.

Still it was nice to observe Jupiter with only one Galilean moon visible (Callisto) again since the last time I observed it.

Best,

Eric

#9 ericj

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Posted 07 April 2013 - 10:25 AM

Did you get a chance to observe it Bryan?

Best,

Eric

#10 ericj

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Posted 07 April 2013 - 10:27 AM

Cool glad you were able to see it Richard.

Best,

Eric






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