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#1 Dave Mitsky

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Posted 17 July 2021 - 02:22 AM

Here are some of the Galiean satellite events taking place on Sunday, July 18th.

04:58 UT, Europa's shadow begins to cross Jupiter.
05:30 UT, Ganymede ends transit of Jupiter.
06:32 UT, Europa begins transit of Jupiter.
07:50 UT, Europa's shadow leaves Jupiter's disk.
08:02 UT, Io enters eclipse by Jupiter's shadow.
09:22 UT, Europa ends transit of Jupiter.

 

https://skyandtelesc...cript-utility/#


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#2 Dave Mitsky

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Posted 17 July 2021 - 02:29 AM

The GRS will transit Jupiter's central meridian at 1:01 am on Monday, July 19th.  

 

https://skyandtelesc...great-red-spot/



#3 REC

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Posted 17 July 2021 - 02:25 PM

Here are some of the Galiean satellite events taking place on Sunday, July 18th.

04:58 UT, Europa's shadow begins to cross Jupiter.
05:30 UT, Ganymede ends transit of Jupiter.
06:32 UT, Europa begins transit of Jupiter.
07:50 UT, Europa's shadow leaves Jupiter's disk.
08:02 UT, Io enters eclipse by Jupiter's shadow.
09:22 UT, Europa ends transit of Jupiter.

 

https://skyandtelesc...cript-utility/#

Busy night for Jupiter!



#4 Dave Mitsky

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Posted 20 July 2021 - 01:16 AM

Wednesday, July 21st

 

The GRS transits Jupiter's CM at 6:39 UT (2:39 a.m. EDT).

 

https://skyandtelesc...great-red-spot/

 

Callisto enters eclipse by Jupiter's shadow at 8:10 UT (4:10 a.m. EDT).

 

https://skyandtelesc...cript-utility/#



#5 Dave Mitsky

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Posted 23 July 2021 - 01:31 AM

The GRS will transit the CM at 8:17 UT (4:17 a.m. EDT) this morning.

 

https://skyandtelesc...great-red-spot/



#6 Dave Mitsky

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Posted 24 July 2021 - 01:55 PM

Sunday, July 25, 2021

02:40 UT, Ganymede's shadow begins to cross Jupiter.
05:18 UT, Ganymede begins transit of Jupiter.
06:20 UT, Ganymede's shadow leaves Jupiter's disk.
07:32 UT, Europa's shadow begins to cross Jupiter.
08:48 UT, Europa begins transit of Jupiter.
08:52 UT, Ganymede ends transit of Jupiter.
09:56 UT, Io enters eclipse by Jupiter's shadow.
10:24 UT, Europa's shadow leaves Jupiter's disk.
11:40 UT, Europa ends transit of Jupiter.
12:52 UT, Io exits occultation behind Jupiter.

 

https://skyandtelesc...cript-utility/#



#7 Dave Mitsky

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Posted 24 July 2021 - 02:22 PM

Here's a screenshot from Stellarium showing the shadow transit on Sunday morning.  Callisto lies to the far left of the image.

Attached Thumbnails

  • Jupiter 7-25-21 Stellarium.JPG


#8 macdonjh

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Posted 25 July 2021 - 01:04 PM

Cross-post: 

 

That was fun (early morning, July 25, 2021)...

 

I set up my 8" Newtonian last night to observe the Ganymede and Europa shadow transits.  I started at approximately 0730 UT when Ganymede's shadow was approximately 2/3 across the disc.  I didn't see Ganymede.  The seeing ranged from poor to good.  While I never lost sight of the equatorial belts (seeing wasn't that bad), sometimes the shadow disappeared.  Other times, though, seeing snapped-to and I could see details in the belts.  I used magnifications of 167x, 200x, and 250x.  200x was the sweet spot when seeing popped, 250x was almost always too much.

 

I missed 1st and 2nd contacts for Europa's shadow, but I came back outside just in time to see 2nd contact for Europa and 4th contact for Ganymede.  What a great coincidence the moons left and arrived at so close to the same time.  For a few minutes Jupiter looked like it had ears.  I was able to follow Europa for a while as it transited, but I lost it after a while.  Another pleasant surprise was to see Europa's shadow and Europa flanking the Great Red Spot.

 

Interesting phenomenon I noticed last night: when Ganymede and Europa were close to Jupiter's limb, each moon looked quite bright and very white.  Previously, I was unable to find Ganymede and later I lost Europa.  As the satellites get closer to the central meridian, do they get lost in the glare?  Does that also cause the contrast between the planet and the moons' colors to decrease, making them harder to see when transiting?



#9 Dave Mitsky

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Posted 25 July 2021 - 03:09 PM

The GRS will transit the CM at 5:46 UT (1:46 a.m. EDT) on Monday morning.

 

https://skyandtelesc...great-red-spot/



#10 Dave Mitsky

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Posted 26 July 2021 - 12:22 AM

Monday, July 26, 2021

07:08 UT, Io's shadow begins to cross Jupiter.
07:46 UT, Io begins transit of Jupiter.
09:28 UT, Io's shadow leaves Jupiter's disk.
10:04 UT, Io ends transit of Jupiter.

 

https://skyandtelesc...cript-utility/#



#11 Dave Mitsky

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Posted 26 July 2021 - 12:56 AM

Here's a screenshot from Stellarium showing the GRS at the time of this post.

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  • GRS Transit 7-26-21 Stellarium.JPG


#12 Dave Mitsky

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Posted 26 July 2021 - 11:21 PM

Io will go into eclipse in 5 minutes.



#13 Dave Mitsky

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Posted 27 July 2021 - 01:04 AM

I watched Io disappear using the Naylor Observatory's 17" classical Cassegrain.  The seeing was mediocre and the best view was at a rather low magnification of 116x.



#14 Dave Mitsky

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Posted 28 July 2021 - 12:33 AM

The GRS will transit this morning at 7:24 UT (3:24 a.m. EDT).



#15 Special Ed

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Posted 28 July 2021 - 03:30 PM

I got to see the end of Io's transit across Jupiter this morning, July 28th.  It was pretty interesting.  My sketch and report are here:  

 

https://www.cloudyni...021/?p=11256630



#16 Dave Mitsky

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Posted 01 August 2021 - 11:48 PM

Monday, August 2, 2021

09:04 UT, Io's shadow begins to cross Jupiter.
09:32 UT, Io begins transit of Jupiter.
11:22 UT, Io's shadow leaves Jupiter's disk.
11:50 UT, Io ends transit of Jupiter.

 

https://skyandtelesc...cript-utility/#



#17 Dave Mitsky

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Posted 02 August 2021 - 12:45 PM

Two eclipse events will occur on Tuesday morning EDT.

Tuesday, August 3, 2021

04:38 UT, Europa enters eclipse by Jupiter's shadow.
06:20 UT, Io enters eclipse by Jupiter's shadow.
08:26 UT, Europa exits occultation behind Jupiter.
09:02 UT, Io exits occultation behind Jupiter.

 

https://skyandtelesc...cript-utility/#



#18 Dave Mitsky

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Posted 06 August 2021 - 01:19 PM

Callisto will be eclipsed at 10:22 p.m. EDT tonight.

Saturday, August 7, 2021

02:22 UT, Callisto enters eclipse by Jupiter's shadow.
09:58 UT, Callisto exits occultation behind Jupiter.
16:30 UT, Io's shadow begins to cross Jupiter.
16:50 UT, Io begins transit of Jupiter.
18:48 UT, Io's shadow leaves Jupiter's disk.
19:08 UT, Io ends transit of Jupiter.


https://skyandtelesc...cript-utility/#



#19 Dave Mitsky

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Posted 09 August 2021 - 01:04 AM

Europa and Io will both be eclipsed on Tuesday morning.

Tuesday, August 10, 2021

07:16 UT, Europa enters eclipse by Jupiter's shadow.
08:14 UT, Io enters eclipse by Jupiter's shadow.
10:42 UT, Europa exits occultation behind Jupiter.
10:46 UT, Io exits occultation behind Jupiter.

 

https://skyandtelesc...cript-utility/#



#20 Dave Mitsky

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Posted 09 August 2021 - 01:08 AM

The GRS will transit the CM this morning at 3:19 a.m. EDT and tonight at 11:10 p.m. EDT.

 

Universal Times of Red Spot transits

08/09/2021 @ 07:19 UT

08/09/2021 @ 17:14 UT

08/10/2021 @ 03:10 UT

 

Corresponding local dates & times of Red Spot transits:

 

08/09/2021 @ 03:19 am

08/09/2021 @ 01:14 pm

08/09/2021 @ 11:10 pm

 

https://skyandtelesc...great-red-spot/


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#21 Dave Mitsky

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Posted 11 August 2021 - 09:14 PM

Thursday, August 12, 2021

00:40 UT, Ganymede enters eclipse by Jupiter's shadow.
02:00 UT, Europa's shadow begins to cross Jupiter.
02:24 UT, Europa begins transit of Jupiter.
02:42 UT, Io enters eclipse by Jupiter's shadow.
04:52 UT, Europa's shadow leaves Jupiter's disk.
05:04 UT, Ganymede exits occultation behind Jupiter.
05:12 UT, Io exits occultation behind Jupiter.
05:14 UT, Europa ends transit of Jupiter.
23:56 UT, Io's shadow begins to cross Jupiter.

 

https://skyandtelesc...cript-utility/#



#22 Dave Mitsky

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Posted 11 August 2021 - 09:35 PM

The GRS will transit the CM at 12:48 a.m. EDT.

 

Universal Times of Red Spot transits centered on date:

08/12/2021 @ 04:48 UT

08/12/2021 @ 14:43 UT

08/13/2021 @ 00:39 UT

 

https://skyandtelesc...great-red-spot/



#23 Dave Mitsky

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Posted 16 August 2021 - 10:31 PM

Tuesday, August 17, 2021

09:54 UT, Europa enters eclipse by Jupiter's shadow.
10:08 UT, Io enters eclipse by Jupiter's shadow.
12:30 UT, Io exits occultation behind Jupiter.
12:56 UT, Europa exits occultation behind Jupiter.

 

https://skyandtelesc...cript-utility/#



#24 Dave Mitsky

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Posted 16 August 2021 - 10:35 PM

The GRS will transit the CM in 20 minutes.

Universal Times of Red Spot transits centered on date:

 

08/17/2021 @ 03:55 UT

08/17/2021 @ 13:50 UT

08/17/2021 @ 23:46 UT

 

Corresponding local dates & times of Red Spot transits:

 

08/16/2021 @ 11:55 pm

08/17/2021 @ 09:50 am

08/17/2021 @ 07:46 pm

 

https://skyandtelesc...great-red-spot/



#25 Dave Mitsky

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Posted 18 August 2021 - 01:59 PM

Thursday, August 19, 2021

04:34 UT, Europa's shadow begins to cross Jupiter.
04:38 UT, Europa begins transit of Jupiter.
04:40 UT, Ganymede enters eclipse by Jupiter's shadow.
06:56 UT, Io exits occultation behind Jupiter.
07:26 UT, Europa's shadow leaves Jupiter's disk.
07:28 UT, Europa ends transit of Jupiter.
08:20 UT, Ganymede exits occultation behind Jupiter.

 

https://skyandtelesc...cript-utility/#




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