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Anypne just seen a Jupiter moon imerge?

Adz

By Adz
in Observing - Planetary

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Adz

Adz

Posted
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Hey guys,

Been out observing with my dad and he noticed a moon imerging jupiters edge in the 11 o clock position at around 11:54.

Looking this up on stellarium we are inclined to think it was Io but has anyone known stellariums moons to be slightly 'off' sometimes?

Left my sky at night mag at work :)

Could someone clarify?

Cheers

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northernnutter

northernnutter

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i also saw this, did you look for io's shadow on the surface of jupiter, it was in the same region as the GRS...was amazing, looked like someone had punched a circle through to the other side, it was inky-black the shadow...very impressive!

Just been out for an observing session with Jupiter tonight. Just to clarify...I saw Io come out from ?behind Jupiter,and then, a little later, when Io had moved away a little from the planet, I saw a distinct, small black dot, in alignment with IO on the surface of jupiter. Daft question, but was I seeing the shadow of Io, or am I getting a little carried away?? If it 'was', I'll be dead pleased!!

Cheers,

Vicky.

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northernnutter

northernnutter

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Yes you were looking at Io"s shadow ok,i was out my self the shadow end time was 00.36,congrats on your first shadow transit.

Paul

Thanks for the clarification Paul!! Brilliant stuff!! I really didn't think it would show up so clearly!! Amazing.

Also, at the same time, I saw a distinct 'elongated/circular' feature on one of the equatorial belts. Checking on stellarium, the GRS (haven't seen this yet!) shouldn't have been visible at that time, so was I viewing a 'small storm'. ??

I must say, I got some great views last night!!

Cheers,

Vicky.

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Dave Smith

Dave Smith

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Just been out for an observing session with Jupiter tonight. Just to clarify...I saw Io come out from ?behind Jupiter,and then, a little later, when Io had moved away a little from the planet, I saw a distinct, small black dot, in alignment with IO on the surface of jupiter. Daft question, but was I seeing the shadow of Io, or am I getting a little carried away?? If it 'was', I'll be dead pleased!!

Cheers,

Vicky.

You did see Io come from behind Jupiter, however that means it was not possible for there to be a shadow transit.

Dates and times of these events can be seen here->http://media.skyandtelescope.com/documents/JphenTab2011-2012.pdf

There was a shadow transit on Tuesday night but not last night. What you did see was a dark patch on the belt which is visible in my not very good image from last night. It would be moving in the opposite direction to Io. You can just see Io in my image.

Dave

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FLO

FLO

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Been out observing with my dad and he noticed a moon imerging jupiters edge in the 11 o clock position at around 11:54.

Looking this up on stellarium we are inclined to think it was Io but has anyone known stellariums moons to be slightly 'off' sometimes?

Most planaterium software will show when a moon emerges from behind Jupiter, but the moon doesn't actually become visible until it emerges from Jupiter's shadow. I am not sure about Stellarium but Starry Night PRO has 3D physics that reliably shows when the moon emerges from the shadow into the sunlight.

Hope that helps,

Steve

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Dave Smith

Dave Smith

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This table may be easier to read:

Thu 15 Sep 2011 19:46 Viewing Resumed - Jupiter Rises

Fri 16 Sep 2011 02:08 Eur: Shadow Transit Begins S

Fri 16 Sep 2011 02:10 GRS: Crosses Central Meridian

Fri 16 Sep 2011 04:13 Eur: Transit Begins ST

Fri 16 Sep 2011 04:37 Eur: Shadow Transit Ends T

Fri 16 Sep 2011 05:42 Viewing Suspended - Sun Rises

Fri 16 Sep 2011 19:42 Viewing Resumed - Jupiter Rises

Fri 16 Sep 2011 22:01 GRS: Crosses Central Meridian

Sat 17 Sep 2011 05:43 Viewing Suspended - Sun Rises

Sat 17 Sep 2011 19:38 Viewing Resumed - Jupiter Rises

Sat 17 Sep 2011 20:15 Eur: Disappears into Eclipse

Sun 18 Sep 2011 00:37 Eur: Reappears from Occultation

Sun 18 Sep 2011 03:48 GRS: Crosses Central Meridian

Sun 18 Sep 2011 05:45 Viewing Suspended - Sun Rises

Sun 18 Sep 2011 19:34 Viewing Resumed - Jupiter Rises

Sun 18 Sep 2011 19:41 Gan: Shadow Transit Ends

Sun 18 Sep 2011 21:56 Gan: Transit Begins T

Sun 18 Sep 2011 23:08 Gan: Transit Ends

Sun 18 Sep 2011 23:39 GRS: Crosses Central Meridian

Mon 19 Sep 2011 04:49 Io : Shadow Transit Begins S

Mon 19 Sep 2011 05:47 Viewing Suspended - Sun Rises

Mon 19 Sep 2011 19:30 Viewing Resumed - Jupiter Rises

Mon 19 Sep 2011 19:44 Eur: Transit Ends

Tue 20 Sep 2011 02:10 Io : Disappears into Eclipse

Tue 20 Sep 2011 05:16 Io : Reappears from Occultation

Tue 20 Sep 2011 05:26 GRS: Crosses Central Meridian

Tue 20 Sep 2011 05:48 Viewing Suspended - Sun Rises

Tue 20 Sep 2011 19:26 Viewing Resumed - Jupiter Rises

Tue 20 Sep 2011 23:18 Io : Shadow Transit Begins S

Wed 21 Sep 2011 00:14 Io : Transit Begins ST

Wed 21 Sep 2011 01:17 GRS: Crosses Central Meridian

Wed 21 Sep 2011 01:28 Io : Shadow Transit Ends T

Wed 21 Sep 2011 02:22 Io : Transit Ends

Wed 21 Sep 2011 05:50 Viewing Suspended - Sun Rises

Wed 21 Sep 2011 19:22 Viewing Resumed - Jupiter Rises

Wed 21 Sep 2011 20:39 Io : Disappears into Eclipse

Wed 21 Sep 2011 21:08 GRS: Crosses Central Meridian

Wed 21 Sep 2011 23:42 Io : Reappears from Occultation

Thu 22 Sep 2011 05:51 Viewing Suspended - Sun Rises

eg: "SST" indicates a triple event. 2 shadow-transits and 1 moon-transit

It was generated by a free application that can be downloaded from my astro club's website here-> Castle Point Astronomy Club

Dave

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