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moons of Saturn visible?

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16 replies to this topic

#1 philipdehazya

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Posted 18 September 2019 - 04:25 PM

Hello all: Is it possible to see any of Saturn's moons with a 14 in dob at 130X under light polluted skies at this time of year? Probable?

Thanks



#2 vdog

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Posted 18 September 2019 - 04:46 PM

I have Bortle 6 skies, and most nights I can see at least 4 moons in my 10".  On a good night, I can see Enceladus as well as the other 4.

 

Use this link and advance the time to see where they are going to be when you'll be observing.  Sometimes I'll bring out a rough sketch of the expected positions so that I can know which is which as I look through the eyepiece:   https://s22380.pcdn....ons/saturn.html


Edited by vdog, 18 September 2019 - 04:48 PM.

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#3 desertstars

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Posted 18 September 2019 - 05:54 PM

You should at least be able to pick out Titan without much trouble. I can see it with an 8" Newtonian easily enough from a suburban back yard.



#4 MalVeauX

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Posted 18 September 2019 - 06:20 PM

Heya,

 

Depends on your light pollution of course, but I see them no problem in my 8".

 

Very best,



#5 Francopoli

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Posted 18 September 2019 - 06:29 PM

In a 14" you should see Rhea, Tethys and Dione easy.  Enceladus and Mimas will be visible in a good steady transparent sky.  I've seen all of the inner moons from the middle of the city at an outreach event where barely 20 stars were in the sky.  Darker skyies help, but I've noted that good seeing and transparency matter more.


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#6 S.Boerner

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Posted 18 September 2019 - 06:32 PM

It may be more than your light polluted sky.  It might be your eyes.

 

Are there many visible house or street lights from your observing site so you are unable to get your eyes dilated?  Use an observing hood or cloth over your head help that.


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#7 tony_spina

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Posted 18 September 2019 - 07:35 PM

With a 120mm refractor I can see 5 moons.  You should be able to see at least 5 or 6



#8 SeaBee1

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Posted 19 September 2019 - 10:02 AM

In a 14 inch? Easy peasy... because in my 10 inch... easy peasy... even in my Bortle 20 skies (is there a Bortle 20? Sure seems like a Bortle 20 to me...).

 

Anyway, yes, you should see at least 4 of the moons, depending on their position and as someone else noted, you need a good map to show their position on the night you look. There are usually a few stars in the area and it is possible to misidentify... don't ask me how I know this...

 

Good hunting!

 

CB


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#9 StarmanDan

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Posted 19 September 2019 - 10:11 AM

Under good conditions, I've seen 9 of Saturn's moons with my 10" dob.

#10 Greyhaven

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Posted 19 September 2019 - 01:02 PM

Under good conditions, I've seen 9 of Saturn's moons with my 10" dob.

Great observing! I just read that between 1655 and 1848 only 8 had been observed in order (Titan,Tethys,Dione, Rhea, Lapetus, Mimas,Enceladus,and in 1848 Hyperion) the rest were discovered with the advent of astrophotography. Congratulations!

Grey



#11 aeajr

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Posted 19 September 2019 - 04:02 PM

Saturn's Moons are certainly visible in 14" and smaller scopes.   

 

Why have you specifically restricted this to 130X.  Should we assume that is the highest power eyepiece you have?  Because if it is,  you are not taking advantage of the capability of your 14".

 

When an 8" Dob was my largest I would frequently be working at 180x and 225X was not too unusual. 

 

I currently use a 12" Dob at my VERY light polluted home site and I regularly observe over 200X with 275X frequently workable.

 

You are not taking advantage of the capacity of your scope if you are restricting it to 130X. 


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#12 Redbetter

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Posted 19 September 2019 - 07:29 PM

Under good conditions, I've seen 9 of Saturn's moons with my 10" dob.

Which 9?  Because I would only expect to catch 8 with a 10" in excellent conditions. Mimas is the toughest of those because of its proximity to the bright planet.  Phoebe is in the high 16's and most often mis-plotted in software so one needs a deep map and the lastest MPC positions to locate it.  Phoebe typically is about 0.5 magnitude past what I expect to see with a 10" in good seeing and very dark skies.


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#13 aeajr

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Posted 20 September 2019 - 08:09 AM

My observing report from last night. bortle 8 with heavy ground light pollution. 12" Dob, 1530 mm FL F5.

Baader Hyperion 8-24 zoom and Explore Scientific 82 6.7.   I also tried the 4.7, but too much magnification. 


Saturn – Saturn never disappoints. I had it in the BH zoom and was working in the 10 to 8 mm range, 150x to 190X. Good clarity and seeing seemed OK at this magnification. Could pick up two cloud bands and the Cassini division was easily seen. Using the 6.7 mm/ 226X I could gain some detail.

 

I picked up Titan, Iapetus, Rhea, Tethys, Dione. I used averted vision to pick up what I think was Enceladus. I may have others in the view but could not distinguish them from stars.

At my house, Saturn sits alone in a blank southern sky.


Edited by aeajr, 20 September 2019 - 12:48 PM.

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#14 kfrank2380

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Posted 20 September 2019 - 08:21 AM

I have fairly high light pollution and I can see 3 usually with a my 8" dob.


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#15 philipdehazya

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Posted 21 September 2019 - 06:29 AM

AEAJR wrote: Why have you specifically restricted this to 130X.  Should we assume that is the highest power eyepiece you have?

 

Yes, that's correct..


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#16 sapin

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Posted 21 September 2019 - 09:49 AM

I can see Titan, Rhea, Dione and Tethys throught my 100mm refractor usually.

#17 aeajr

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Posted 21 September 2019 - 11:13 AM

AEAJR wrote: Why have you specifically restricted this to 130X.  Should we assume that is the highest power eyepiece you have?

 

Yes, that's correct..

Time to add to your eyepiece collection.

 

Understanding Telescope Eyepieces- There are recommendations, based on budget, but the meat of the article is about understanding the issues when selecting eyepieces.
https://telescopicwa...cope-eyepieces/

Understanding and using a Barlow Lens
https://telescopicwatch.com/?s=barlow

 

 

Accessories to add to your Telescope
https://telescopicwa...ls-accessories/




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