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ericj
professor emeritus


Reged: 02/17/05

Obs Alert: Jupiter with 3 shadow transits 10/12/13
      #6064100 - 09/05/13 10:26 AM

Hi,

On October 12th, 2013 at 4:32 UT there will be a rare triple shadow event across Jupiter lasting 65 minutes. As shown below in the SkyMap Pro map the moons casting the shadows on Jupiter are Io, Europa, and Callisto. Callisto will be casting its shadow on the South Polar Region of Jupiter.

Also below is a sketch made by George Phillips Bond of a three shadow transits on Jupiter on on January 28th, 1848 using the 15" Great Refractor. Using SkyMap Pro I was able to determine that the shadow transits that night were from Io, Europa, and Ganymede.


http://ejamison.net/recent_obs11.html#2

Clear Skies,

Eric Jamison


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Tonk
Postmaster
*****

Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: ericj]
      #6064492 - 09/05/13 01:46 PM

10/12/13 - for non-Americans this is 12/10/13

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azure1961p
Postmaster
*****

Reged: 01/17/09

Loc: USA
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Tonk]
      #6065390 - 09/05/13 11:17 PM

Thanks Eric. My Sky Safari shows it well. Trouble is its so low in the east. The seeing would ruin it so Im passing on this one but thanks for the heads up.

Pete


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Cotts
Just Wondering
*****

Reged: 10/10/05

Loc: Toronto, Ontario
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Tonk]
      #6066306 - 09/06/13 02:53 PM

Quote:

10/12/13 - for non-Americans this is 12/10/13




Ok, I will take the final step down the road of pedantry. The correct scientific method of writing dates and times is:

year, month, day, hour, minute, second. Always the largest time division first.

So, Oct. 12, 2013 would be most correctly written as 2013/10/12.

This has nothing to do with one's country or continent.

Let the games begin!!!!

Dave


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Cotts
Just Wondering
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Reged: 10/10/05

Loc: Toronto, Ontario
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Cotts]
      #6066334 - 09/06/13 03:04 PM

And, while I'm here, the correct pronunciation of "kilometre" is kill' - oh - mee - - ter. Not kill - ah' - mit - ter.

All metric unit prefixes, from kilo, to mega to pico to centi and all the others are pronounced with the accent on the first syllable of the prefix, never the second syllable. Funny thing is, everyone does this correctly for every commonly used metric measurement except the kilometre. Why is that, anyway?

Fun test: try pronouncing, out loud, the following metric terms, first with the accent in its correct place, on the first syllable, and then with the accent as misused in 'kilometre', with the accent on the second syllable. You will soon see how wrong the killAHMetre people are...

kilopascals
megabyte
picofarad,
milliwatt
centimetre
gigawatt.

Rant over. Thanks for listening.

Dave


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brianb11213
Postmaster
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Reged: 02/25/09

Loc: 55.215N 6.554W
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Cotts]
      #6066451 - 09/06/13 04:02 PM

Quote:

And, while I'm here, the correct pronunciation of "kilometre" is kill' - oh - mee - - ter. Not kill - ah' - mit - ter.



Not in the USA ... try 0.621375 miles instead.

They even have the wrong size gallons - smaller than proper ones - and then wonder why they get poor mpg from their "automobiles".


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Special Ed
Postmaster
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Reged: 05/18/03

Loc: Greenbrier Co., WV 38N, 80W
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: brianb11213]
      #6067142 - 09/07/13 01:06 AM

Eric,

Thanks for the post and the historical sketch by George Bond--pretty cool. Too bad that Jupiter will only be 4 above the horizon here in the eastern US but hopefully our friends who live all those thousands of units of measurement east of here will get to see it.


Quote:

And, while I'm here, the correct pronunciation of "kilometre" is kill' - oh - mee - - ter. Not kill - ah' - mit - ter.




Cotts, thanks for the pronunciation lesson--I've always wondered about that. I thought they were called "clicks".

BTW, it's spelled "ter", not "tre".


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t.r.
Post Laureate
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Reged: 02/14/08

Loc: Upstate NY
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Special Ed]
      #6067328 - 09/07/13 07:39 AM

Okay, I'll bite...technically it's referred to as a "Klick" as in "4.5 klicks to target"!
How low will Jove be from the east coast for this BTW?


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Tom and Beth
Post Laureate


Reged: 01/08/07

Loc: Tucson, AZ
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: t.r.]
      #6068049 - 09/07/13 03:51 PM

Quote:

Okay, I'll bite...technically it's referred to as a "Klick" as in "4.5 klicks to target"!
How low will Jove be from the east coast for this BTW?




My Plantarium shows Jove rises at 11:20 local time, so you're probably out of luck unless you like looking just above the Horizon.
Darn...


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Rick Woods
Postmaster
*****

Reged: 01/27/05

Loc: Inner Solar System
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Cotts]
      #6068573 - 09/07/13 09:24 PM

Quote:

Quote:

10/12/13 - for non-Americans this is 12/10/13




Ok, I will take the final step down the road of pedantry. The correct scientific method of writing dates and times is:

year, month, day, hour, minute, second. Always the largest time division first.

So, Oct. 12, 2013 would be most correctly written as 2013/10/12.

This has nothing to do with one's country or continent.

Let the games begin!!!!

Dave




...And that's "correct" because it sorts properly that way.


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Robert Cook
sage
*****

Reged: 07/23/09

Loc: San Diego County, California
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: brianb11213]
      #6068603 - 09/07/13 09:55 PM

Quote:

Quote:

And, while I'm here, the correct pronunciation of "kilometre" is kill' - oh - mee - - ter. Not kill - ah' - mit - ter.



Not in the USA ... try 0.621375 miles instead.




Well, here in America my calcumalator says that a kee-LAH-meter is closer to 0.621371 miles. I guess arithmetic works differently here, too. So where is it more accurate? Yeah, that's what I thought.


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Jarad
Postmaster
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Reged: 04/28/03

Loc: Atlanta, GA
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Cotts]
      #6071430 - 09/09/13 02:24 PM

Quote:

Ok, I will take the final step down the road of pedantry. The correct scientific method of writing dates and times is:

year, month, day, hour, minute, second. Always the largest time division first.

So, Oct. 12, 2013 would be most correctly written as 2013/10/12.

This has nothing to do with one's country or continent.





Our rule to avoid any possible ambiguity is to record dates as: DD-MON-YYYY
So October 12, 2013 is written as 12-Oct-2013.

Last year I had to do a data cleaning on medical data recorded by a mix of U.S. and U.K. nurses. It took weeks - I never realized how many different units there are, and how many ways to write them down. One patient had 2 nurses taking shifts, one recorded his temps in Celsius, the other in Fahrenheit. It took me while to figure out what unit they used for his blood pH - turned out to be nanomoles of hydrogen ions per liter. And nobody ever bothers to write down which units they used, just the number...

The worst was trying to match up the hospital data with the lab data. The lab data comes with a specimen ID, not the patient name. In the spot for specimen on the hospital record, instead of putting the ID#, they just put "Yes"...



Jarad


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Tyranthrax
sage


Reged: 04/22/13

Loc: Reno, NV
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Jarad]
      #6077152 - 09/12/13 02:21 PM

You could use julian dates.. . .I'm in a desert so math and time don't function properly here.

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ericj
professor emeritus


Reged: 02/17/05

Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Tyranthrax]
      #6082413 - 09/15/13 04:53 PM

Hi Pete and Michael,

While Jupiter will be low in the sky for observers in the Eastern United States it may still be worth while to observe it. This is because sometimes the seeing conditions can be better than expected. There have been times I have set up my telescope to observe a celestial event and the seeing did not seem like it would be very good. Still I ended up seeing some detail that I would not have otherwise seen if I did not set up the telescope.

For example during the Venus transit across the Sun on June 8th, 2004, Venus and the Sun were only around ten degrees in elevation when I began obsering them. Still, I saw far more detail than I expected:

http://ejamison.net/recent_obs.html#6

Best,

Eric


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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Jarad]
      #6085033 - 09/16/13 11:30 PM

Jarad, thanks for the hilarious and sad anecdote about labeling data. I'm stealing this word-for-word as an example for my science students.

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aa6ww
professor emeritus
*****

Reged: 10/23/11

Loc: Sacramento, Calif.
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: kfiscus]
      #6097025 - 09/23/13 03:50 PM

Can someone translate this into my time here in California?, this is too much for me to decipher.

..Thanks.

Ralph


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Edward E
scholastic sledgehammer
*****

Reged: 03/26/06

Loc: Tucson, Arizona
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: aa6ww]
      #6097279 - 09/23/13 06:49 PM

For us here on the west side of the USA it translate as "Out of Luck" or below the horizon.

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Mark Harry
Vendor
*****

Reged: 09/05/05

Loc: Northeast USA
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Edward E]
      #6110600 - 10/01/13 05:40 AM

+ 1 for jarad and Tonk!
M.


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David Gray
sage
*****

Reged: 08/06/12

Loc: Co. Durham UK
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: ericj]
      #6132404 - 10/12/13 02:30 AM

No luck here: typical UK skies - consoled myself watching a real-time animation on WinJupos.

No doubt many images will appear from the more fortunate I might just avoid them.........

David.


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azskies
Carpal Tunnel


Reged: 04/29/07

Loc: Prescott, AZ
Re: Obs Alert: Jupiter with 3 shadow transits 10/12/13 new [Re: Edward E]
      #6132852 - 10/12/13 11:27 AM

Quote:

For us here on the west side of the USA it translate as "Out of Luck" or below the horizon.




Yeah, with us being in the 21st century you think there would have been a time table for when and where it won't be seen....just like eclipses!

Jeff


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