Triple Shadow Transit Across Jupiter - Oct 11-12

1373 views
15 replies
1 rating 2 rating 3 rating 4 rating 5 rating
  • Member since
    May, 2005
Triple Shadow Transit Across Jupiter - Oct 11-12
Posted by Centaur on Monday, September 30, 2013 6:11 PM
During the night of October 11-12, there will be simultaneous transits across the apparent disk of Jupiter by the shadows of three of its Galilean satellites. This has not occurred since 2004. For those who are wondering, having four simultaneous shadows is impossible. The shadows of Io, Europa and Callisto will all be in transit from 23:30 CDT to 00:46 CDT (UT-5).   
 
I’ve created preview graphics of the triple shadow event as seen from above Jupiter’s north pole and as seen from Earth. They can be viewed at: www.CurtRenz.com/jupiter
 
Now that Jupiter is beginning to reenter our evening sky, I’ve resumed publication of my nightly event timetable and graphical array of Jupiter’s four Galilean satellites and their shadows. They can be accessed at the same webpage.
 
Photos and descriptions of the triple shadow transit would be welcome additions to this thread.

For astronomical graphics, including monthly wallpaper calendar, visit:

www.CurtRenz.com/astronomical


Moderator
  • Member since
    July, 2001
  • From: PA, USA, Earth Moderator
Posted by DaveMitsky on Monday, September 30, 2013 9:24 PM

During the event, Callisto’s shadow falls on the disk of Jupiter first, followed by Europa’s, and then Io’s. Callisto’s shadow crosses the south polar region of Jupiter. Another triple shadow transit won’t take place until June 3, 2014.

Numerous double Galilean shadow transits also occur this month. The most favorable ones for North American observers take place on the mornings of October 17, October 19, and October 26.

Dave Mitsky

Sic itur ad astra!

Chance favors the prepared mind.

A man is a small thing, and the night is very large and full of wonders.

  • Member since
    May, 2005
Posted by Centaur on Wednesday, October 09, 2013 3:42 PM
This event becomes tougher the further west one is located in North America. Those on the west coast may be unable to see any of the shadow transits, but they should be able to observe some of the transits of the actual Galilean satellites.
 
Here are my predictions for the transits including partial phases in Universal Time during 2013 OCT 12.
 
03:24:57 - 05:45:59 UT - #4 Callisto's Shadow
03:28:02 - 06:02:36 UT - #2 Europa's Shadow
04:29:37 - 06:45:41 UT - #1 Io's Shadow
 
05:46:02 - 08:04:31 UT - #1 Io
06:00:10 - 08:45:43 UT - #2 Europa
15:04:30 - 18:31:25 UT - #4 Callisto

For astronomical graphics, including monthly wallpaper calendar, visit:

www.CurtRenz.com/astronomical


  • Member since
    May, 2002
  • From: Southern California near Disneyland
Posted by Silveradogold on Wednesday, October 09, 2013 7:50 PM

Centaur, thank you for the info, but I'm not sure I will be able to see this event.

Clear Skies ----- Silveradogold Cool

 

33° 48' 10"N, 117° 57' 49"W "Remember, without data your conclusion is just another opinion" Look at all the stars. You look up and you think, "God made all this and He remembered to make a little speck like me." It's kind of flattering, really. +++ 150mm SkyWatcher refractor - 120mm reflector - Celestron SkyMaster 15x70mm Binoculars +++

  • Member since
    May, 2005
Posted by Centaur on Friday, October 11, 2013 9:51 AM

My timetable for tonight's triple shadow transit across Jupiter and the later transits of the Galilean satellites is now available on my Jupiter webpage: www.CurtRenz.com/jupiter . It includes start and finish times for both the partial and total phases of the events. Timing verifications from observers would be appreciated.

 

For astronomical graphics, including monthly wallpaper calendar, visit:

www.CurtRenz.com/astronomical


  • Member since
    October, 2013
Posted by Andrew1311 on Friday, October 11, 2013 10:23 AM

I've read here http://deepspace-explorer.blogspot.it/ that an unknown Norwegian astronomer claimed to have documented a slight shadow that was moving on the Moon and that it could be an asteroid, with an unknown structure and impossibile to measure, heading toward Earth. Is it possibile? Why don't we have news?

 

 

  • Member since
    October, 2013
Posted by Andrew1311 on Friday, October 11, 2013 10:31 AM

 

I've read here deepspace-explorer.blogspot.it/ that an unknown Norwegian astronomer claimed to have documented a slight shadow that was moving on the Moon and that it could be an asteroid, with an unknown structure and impossibile to measure, heading toward Earth. Is it possibile? Do you anything?

 

  • Member since
    May, 2002
  • From: Southern California near Disneyland
Posted by Silveradogold on Friday, October 11, 2013 12:02 PM

Excellent info, Centaur,

Wow, you really create some good graphics.

 

I also noted from my planetarium program StarCalc, that Jupiter will make a very close approach to Wasat, Delta Geminorum, on December 10, 2013.

Do you concur? It looks really interesting and might make for a great observation.

 

Clear Skies ----- Silveradogold Cool

 

Tags: Jupiter , awesome , moon , planet

33° 48' 10"N, 117° 57' 49"W "Remember, without data your conclusion is just another opinion" Look at all the stars. You look up and you think, "God made all this and He remembered to make a little speck like me." It's kind of flattering, really. +++ 150mm SkyWatcher refractor - 120mm reflector - Celestron SkyMaster 15x70mm Binoculars +++

  • Member since
    May, 2005
Posted by Centaur on Friday, October 11, 2013 12:38 PM

Silveradogold

Excellent info, Centaur,

Wow, you really create some good graphics.

 

I also noted from my planetarium program StarCalc, that Jupiter will make a very close approach to Wasat, Delta Geminorum, on December 10, 2013.

Do you concur? It looks really interesting and might make for a great observation.

 

Clear Skies ----- Silveradogold Cool

 

 

Thanks, Silveradogold. Good catch on Delta Geminorum. Geocentrically, Jupiter will pass north of it by 15 arcminutes (about half the width of a Full Moon) on 2013 DEC 10 at 12 hr UT. They normally appear rather close at approximately 12-year intervals. In 2096 the separation will be only 6 arcminutes.

For astronomical graphics, including monthly wallpaper calendar, visit:

www.CurtRenz.com/astronomical


  • Member since
    May, 2005
Posted by Centaur on Friday, October 11, 2013 2:13 PM

Andrew1311

I've read here http://deepspace-explorer.blogspot.it/ that an unknown Norwegian astronomer claimed to have documented a slight shadow that was moving on the Moon and that it could be an asteroid, with an unknown structure and impossibile to measure, heading toward Earth. Is it possibile? Why don't we have news?

Welcome to the discussion group, Andrew1311.

For a shadow to appear on the Moon, the object would have to be quite close to the Moon or very large. In either case, the object itself would be much more obvious to us than the shadow.

A sighting by an "unknown" observer is hardly credible. The term astronomer does not necessarily refer to a professional; no license is required. It could have been a smudge on a telescope or a defect in a camera.

Ignore sensationalist blogs that infect the internet with unverified nonsense designed to scare people. It's a good thing you brought your question here.

For astronomical graphics, including monthly wallpaper calendar, visit:

www.CurtRenz.com/astronomical


Moderator
  • Member since
    July, 2002
  • From: Texas
Posted by chipdatajeffB on Friday, October 11, 2013 5:21 PM

While it is possible for such a sighting to occur, it is highly unlikely that it was an asteroid "headed for Earth" or it would have hit us by now (after all, it's only a quarter-million miles away).

 

I realize that "heading for" does not necessarily imply a potential impact. Asteroids do pass between Earth and Moon from time to time, harmlessly.

 

As Curt points out, an Internet blog is not exactly the most reliable source of information ... There are professional and amateur near-Earth asteroid searches running every night. We *think* we are accounting for the big ones pretty well. The Lake Chebarkul/Chelyabinsk meteorite that entered over Russia in February was certainly a wake-up call (we didn't see it coming, and it did hit us) even though it was not a planet-killer or extinction-event object. It showed us the damage that even a relatively small asteroid can cause.

 

The universe is not only stranger than we imagine, it's stranger than we CAN imagine. --- JBS Haldane

Come visit me at Comanche Springs Astronomy Campus (we're on Google Maps) in Texas.

www.3rf.org

Moderator
  • Member since
    July, 2002
  • From: Texas
Posted by chipdatajeffB on Friday, October 11, 2013 5:25 PM

By the way, at the aforementioned blog when you click on the Read More link at any of the entries you are taken to an advertisement/sample of a scifi novel about this topic.

 

Caveat emptor ...

The universe is not only stranger than we imagine, it's stranger than we CAN imagine. --- JBS Haldane

Come visit me at Comanche Springs Astronomy Campus (we're on Google Maps) in Texas.

www.3rf.org

  • Member since
    May, 2005
Posted by Centaur on Friday, October 11, 2013 6:09 PM

chipdatajeffB

By the way, at the aforementioned blog when you click on the Read More link at any of the entries you are taken to an advertisement/sample of a scifi novel about this topic.

 

Caveat emptor ...

 

 

Indeed, Jeff, I should have added that a common reason they try to scare people is to sell books.

For astronomical graphics, including monthly wallpaper calendar, visit:

www.CurtRenz.com/astronomical


  • Member since
    May, 2002
  • From: Southern California near Disneyland
Posted by Silveradogold on Friday, October 11, 2013 11:03 PM

Centaur

 

 
Silveradogold

Excellent info, Centaur,

Wow, you really create some good graphics.

 

I also noted from my planetarium program StarCalc, that Jupiter will make a very close approach to Wasat, Delta Geminorum, on December 10, 2013.

Do you concur? It looks really interesting and might make for a great observation.

 

Clear Skies ----- Silveradogold Cool

 

 

 

 

Thanks, Silveradogold. Good catch on Delta Geminorum. Geocentrically, Jupiter will pass north of it by 15 arcminutes (about half the width of a Full Moon) on 2013 DEC 10 at 12 hr UT. They normally appear rather close at approximately 12-year intervals. In 2096 the separation will be only 6 arcminutes.

 

Well, I think you will have to post this also. I think it would be appreciated.

Clear Skies ----- Silveradogold Cool

 

33° 48' 10"N, 117° 57' 49"W "Remember, without data your conclusion is just another opinion" Look at all the stars. You look up and you think, "God made all this and He remembered to make a little speck like me." It's kind of flattering, really. +++ 150mm SkyWatcher refractor - 120mm reflector - Celestron SkyMaster 15x70mm Binoculars +++

Moderator
  • Member since
    July, 2001
  • From: PA, USA, Earth Moderator
Posted by DaveMitsky on Saturday, October 12, 2013 2:06 AM

Centaur
 
chipdatajeffB

By the way, at the aforementioned blog when you click on the Read More link at any of the entries you are taken to an advertisement/sample of a scifi novel about this topic.

 

Caveat emptor ... 

 

Indeed, Jeff, I should have added that a common reason they try to scare people is to sell books.

 

This may have been merely an attempt to circumvent the forum policy prohibiting advertising.

Dave Mitsky 

Sic itur ad astra!

Chance favors the prepared mind.

A man is a small thing, and the night is very large and full of wonders.

  • Member since
    May, 2005
Posted by Centaur on Saturday, October 12, 2013 11:43 AM
Here’s a photo of the event emailed to me by my Belgian astronomical author friend Jean Meeus. It was taken by his friend Bart Declercq in Belgium this morning at 05:03 UT.
 

 

http://www.curtrenz.com/TripleShadow.JPG

For astronomical graphics, including monthly wallpaper calendar, visit:

www.CurtRenz.com/astronomical


Join our Community!

Our community is FREE to join. To participate you must either login or register for an account.

ADVERTISEMENT

FREE EMAIL NEWSLETTER

Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter.

ADVERTISEMENT
ADVERTISEMENT
Find us on Facebook

Loading...