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FORUMS Photo Sharing & Visual Enjoyment Astronomy & Celestial 
Thread started 21 Feb 2018 (Wednesday) 17:48
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Jupiter & Galilean Moons: Europa, Io and Ganymede

 
nardes
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Feb 21, 2018 17:48 |  #1

I was testing some new gear on my telescope and everything worked so well that I decided to continue with the session. At around 3:00am, I recorded this image of the planet Jupiter with 3 of the Galilean Moons, Europa (with shadow), Io and Ganymede. You can just make out a little shading detail on Ganymede.

At the time, Jupiter was “in” the constellation of Libra, some 801,844,586 Kilometres from Earth. For those used to the “old” units, that equates to 498,243,126 miles.

Jupiter is the fifth planet from the Sun and the largest in the Solar System, with an equatorial diameter of 139,822 km and an Apparent Angular Diameter of 0° 00' 37".

Taken with a Tak Mewlon 210 F11.5, TeleVue Powermate x2.0, ZWO ASI 120MM-S and Starlight Xpress USB FW.

The image is made up of frames processed from 30 sec duration movie files (AVI's) taken through Red, Green and Blue filters.

Cheers

Dennis


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Capn ­ Jack
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Feb 21, 2018 18:12 |  #2

Cool!
What is the spot on the "southwest" part of Jupiter? A shadow of one of the moons? Or another moon in silhouette?




  
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nardes
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Feb 21, 2018 21:49 |  #3

Capn Jack wrote in post #18569300 (external link)
Cool!
What is the spot on the "southwest" part of Jupiter? A shadow of one of the moons? Or another moon in silhouette?

Hi Capn Jack

Good pick up - that is the shadow of the moon Europa as it transited the disc of Jupiter. Here are a couple of earlier images that show the progression.

Cheers

Dennis


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Celestron
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Feb 22, 2018 07:46 |  #4

Great captures ! Glad to finally see some good planet images as well as their satellite planets . Well done . Very nice equipment too !!




  
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Davenn
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Mar 04, 2018 03:02 |  #5

Awesome work, Dennis

look forward to more :-)

Dave


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nardes
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Mar 04, 2018 03:14 |  #6

Davenn wrote in post #18577115 (external link)
Awesome work, Dennis

look forward to more :-)

Dave

Thanks Dave, I appreciate the words of encouragement.:-)

Now if only the weather would cooperate - been cloudy for several nights now!:-(

Cheers

Dennis




  
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Dawna90
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Mar 13, 2018 02:07 as a reply to  @ nardes's post |  #7

A shadow of one of the moons? Or another moon in silhouette?




  
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nardes
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Mar 13, 2018 05:16 |  #8

Dawna90 wrote in post #18584252 (external link)
A shadow of one of the moons? Or another moon in silhouette?

The dark spot is the shadow of Europa. When one of the Galilean moons (the Galilean moons are the four largest moons of Jupiter—Io, Europa, Ganymede, and Callisto) transits in front of Jupiter, the moon is illuminated by the light from the Sun, so it will appear as a bright object against the disc of Jupiter.

Here is a screen capture from the observation planning application "SkyTools 3 Pro" identifying the shadow of Europa.

Cheers

Dennis


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Jupiter & Galilean Moons: Europa, Io and Ganymede
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