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#101 Special Ed

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Posted 29 August 2014 - 03:22 PM

Lame.    ;)  



#102 azure1961p

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Posted 29 August 2014 - 09:55 PM

I liked it.

 

pete



#103 Rich (RLTYS)

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Posted 30 August 2014 - 07:07 AM

Come on folks, back on subject.

 

Rich (RLTYS)



#104 oleg oleg

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Posted 31 August 2014 - 02:22 AM

Hello! This summer, I and my friend are trying to see something on Uranus. Only about 15 recorded observations did not give a positive result, while we do not notice anything definite. All that we see - all sorts of noises that are not related orientation. Country observation - Russia, telescopes - 10" newtonians.    We do not renounce further searches may in the future have more luck.   As for me, I had a good experience of seeing the details of satellite Ganymede.   I also conducted a test to differentiate between points and lines of low contrast on paper, it seems there is no deviation, 1.5% contrast is very similar to the limit. I doubt that in practical cases (small discs) can operate with such figures.


Edited by oleg oleg, 31 August 2014 - 02:25 AM.


#105 stanislas-jean

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Posted 31 August 2014 - 01:29 PM

Hello! This summer, I and my friend are trying to see something on Uranus. Only about 15 recorded observations did not give a positive result, while we do not notice anything definite. All that we see - all sorts of noises that are not related orientation. Country observation - Russia, telescopes - 10" newtonians.    We do not renounce further searches may in the future have more luck.   As for me, I had a good experience of seeing the details of satellite Ganymede.   I also conducted a test to differentiate between points and lines of low contrast on paper, it seems there is no deviation, 1.5% contrast is very similar to the limit. I doubt that in practical cases (small discs) can operate with such figures.

The test on a sheet of paper is say a preliminary.

The vision of the same paper at a long distance under different lighting until the moolighting constitutes a difficulty at 2 steps above. You may push the simulation using a black paper with a small disk on, the diameter of a 2euro cents at 1km with the same lighting conditions, even very low.

Just do it!

Ganymede is not a comparative difficulty with contrast appoaching 0.5 for the more.

The main features are only curved lines of 1" width and 3.6" long for the larger.

The benefit of such ground test this is simulation with lighting adjustable easily (daylight, dawn, moon light) with the seeing study as a bonus.An artificial star just on the cible side will help.

Do it, this brings a lot.

Stanislas-Jean



#106 azure1961p

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Posted 31 August 2014 - 01:50 PM

Oleg,

 

I recall your Ganymede renderings very well and I thought they were fantastic.  My feelings are Uranus probably needs no less than 12" aperture under the best conditions but that's speculation as my 8" is the largest Ive actually employed.

 

Pete



#107 stanislas-jean

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Posted 01 September 2014 - 01:34 AM

Oleg,

 

I recall your Ganymede renderings very well and I thought they were fantastic.  My feelings are Uranus probably needs no less than 12" aperture under the best conditions but that's speculation as my 8" is the largest Ive actually employed.

 

Pete

As nothing is reported already with the 8" I doubt strongly of something captured with a 12" by the same observer.

The contrast is not enhanced by 1.5x!

8" can be used fruitfully by observers, in fact few, deep trained and with adequate conditions (with a good vision in the reddish part of the light Spectrum).

Stanislas-Jean



#108 azure1961p

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Posted 01 September 2014 - 09:47 AM

Stan,

 

no.

 

Pete



#109 oleg oleg

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Posted 01 September 2014 - 11:40 AM

Well, I'm well prepared, as an observer of the planets. Yes, I am confident I see dark spots on Ganymede, and Callisto twice seen in the realism of these observations I have no doubt, I not only heard from others, but surely saw !   With Uranus  another thing - yes, I hear from others, but  I do not see.   I continue to watch.


Edited by oleg oleg, 01 September 2014 - 11:43 AM.


#110 stanislas-jean

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Posted 01 September 2014 - 12:22 PM

Well, I'm well prepared, as an observer of the planets. Yes, I am confident I see dark spots on Ganymede, and Callisto twice seen in the realism of these observations I have no doubt, I not only heard from others, but surely saw !   With Uranus  another thing - yes, I hear from others, but  I do not see.   I continue to watch.

240mm and 17% CO will help surely with good level optics.

Hope you will get.

Good skies.

Stanislas-Jean

 

Stan,

 

no.

 

Pete

Oh yes

S-J



#111 lbilello-LINY

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Posted 08 September 2014 - 07:31 PM

Have been observing the 7th planet lately.  Have yet to view any of the moons, and not sure if I will with my current gear.  I cannot confirm viewing of any moon with my 8" even with averted vision.  Over the summer I was able to clearly see 6 moons of Saturn.  Has anyone had luck with 10" or 12"?  If you have a larger scope do you consistently view the moons or is it spotty.

 

Later in the month I'll take a look at Neptune to see if I can spot any of it's moons.



#112 azure1961p

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Posted 08 September 2014 - 07:42 PM

I've found Triton is easier than Uranus' moons simply because the planet being dimmer makes it less of a glare problem.  If seeing is fair and transparency as well with no moon triton ought to show dimly anyway.

 

Pete



#113 Love Cowboy

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Posted 08 September 2014 - 08:27 PM

I saw Titania and Oberon on my first viewing of Uranus, but that was with a 16", and they were difficult.  It does seem that an 8" would be a tall order. 



#114 azure1961p

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Posted 08 September 2014 - 09:04 PM

Nah.  At elongation its not tall, just faint and good if Uranus is out of view.

 

Pete



#115 aatt

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Posted 10 September 2014 - 09:46 AM

I have seen Titania and Oberon in a 15" under good seeing.



#116 Perigny270

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Posted 13 September 2014 - 10:05 AM

I have seen Titania with my 8SE on a night with perfect skies. I look for it (and Oberon) every chance I get. Triton would be a nice catch too.



#117 penguinx64

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Posted 13 September 2014 - 05:49 PM

I finally saw Uranus tonight.  It looked good at 107x.  I didn't see any moons though.  Seeing conditions wouldn't let me use higher magnifications and still get a clear view.  Now when I go to work on Monday, I can tell my friends I stayed up til Midnight on Saturday and saw Uranus with my telescope!  They'll either be impressed or slap me.



#118 NorthWolf

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Posted 17 September 2014 - 08:14 PM

Are filters worth using for viewing Uranus at high magnification? (300-350x)

#119 Illinois

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Posted 18 September 2014 - 08:15 AM

Are filters worth using for viewing Uranus at high magnification? (300-350x)

 

I don't think so, if you have some color filters then try it and let us know! Uranus is so small and need high power for some details.



#120 azure1961p

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Posted 19 September 2014 - 09:00 PM

I would imagine it isn't profitable under 12" aperture.   I know some have tried with 8" but I've git reservations about a deep red yielding benefit there. It's been suggested a yellow might work and this makes sense.

 

Pete








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