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Thread: Very bright planets (I can't see any detail)

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    Question Very bright planets (I can't see any detail)



    Hi all!!
    Recently I bought a telescope Meade Polaris 130mm f / 5, to observe DSO has resulted in a very good telescope, being able to see even M1 in my neighborhood with some light pollution. But when I want to see planets these appear as a clear disk without any detail whatever the magnification; For example Saturn appears as a yellowish oval disk without distinguishing between the planet and the rings; And Jupiter appears as a white disk without. With Venus it is worse, it appears like a flash, without being able to see its form. In my other telescopes, a 60mm refractor and a 72mm reflector I could distinguish those details without problems. What can I do to improve this problem?
    Meade Polaris 130mm EQ, Meade Adventure Scope 80mm, Bushnell Northstar 76mm, Tasco refractor 60mm, Bushnell Instafocus 10x50, Meade 20mm Super Plössl Series 4000, Celestron UHC/LPR filter, Solomark Moon & Skyglow filter, Solomark IR/UV cut filter, MS Lifecam Studio mod., Meade Smartphone adapter Pura vida & Clear skies!!

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    Default Re: Very bright planets (I can't see any detail)

    Hi Felipe,

    I'm certain that you'll be getting solid advice from others more experienced than me, but visually, the planets will only show up as disks in your eyepiece. Venus is currently showing as a partial disk, like a miniature version of the Moon in one of its phases. With Saturn, depending on the orientation of the rings, they may not be visible at all if they are edge-on (I do not know what their orientation is these days, but I think they are not very visible lately?).

    The images you see of the planets show detail that is gathered by the camera, as well as image processing, or stacking many images together to achieve an image with detail in it. This is not what one can see through the eyepiece.

    I hope this helps. Like I said, others will have more thoughts and advice for you, too.

    smp
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    Default Re: Very bright planets (I can't see any detail)

    Have you collimated your scope yet? The 130 requires an exacting collimation to give the best view of Jupiter and Saturn. It is very unforgiving if even slightly out of collimation. You will need a Cheshire collimator or Laser collimator to obtain this level of accuracy.
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    Default Re: Very bright planets (I can't see any detail)

    What eyepieces were you using?
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    Default Re: Very bright planets (I can't see any detail)

    Mars is currently far away from earth. Your description of Venus and Mars, is typical. You aren't looking at these other planets a few degrees above the Horizon are you? I know Jupiter doesn't rise till around 12 or later. And Saturn very early morning. Looking through a hundred miles of atmosphere can ruin your views. But I don't know maybe it is collimation, or combination of multiple factors. Try observing Venus during twilight. If you can discern the disk of Jupiter and Saturn. Venus may just be too bright. Planets may be a little more finicky to proper collimation and focus etc.
    Last edited by Ell198679; 02-04-2017 at 02:40 AM.
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    Default Re: Very bright planets (I can't see any detail)

    650mm is a bit short but I can see lots of details on Jupiter and Saturn with my 750mm Newt with an 8mm-6mm eyepiece on a clear night. The planets look the very best when at their highest declination. Seeing and transparency of the upper atmosphere will have an effect on your view as well. As mentioned collimate the scope to your very best abilities and keep at it. You will be rewarded with great views!
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    Default Re: Very bright planets (I can't see any detail)

    Thank you all for your advice, I currently have the eyepieces that come with the telescope, 26mm. MA, 9mm. MA and 6mm MA. I'm going to collimate the telescope and expect better results. These last days in my country the weather has been windy and dry and the night sky appears a little dirty, it must be by the dust in the atmosphere. But even under these conditions I can easily distinguish the rings of Saturn, some bands of Jupiter clouds and the mon shape of Venus with my Tasco telescope of 60mm with the cheap eyepieces of .965 ". I expect more detail from the planets with the 130mm telescope, but I'm satisfied with those DSOs I've been able to observe.
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    Default Re: Very bright planets (I can't see any detail)

    The 130mm reflector really excels at wide field DSO observing, planets are not it's strong suit. However, you still can get good views of the planets but your collimation really needs to be very good. Also the EPs you are using are not the best, especially for a fast Newt. You can get better performance from some very affordable plossl EPs. But if you can, I would invest in some EPs a step above the plossls (Celestron X-Cels, Meade HDs, etc.). Sometimes planetary detail is lost in the glare because the planet is so bright. A variable polarizing filter will totally remove the glare to vastly improve the view and is the best moon filter because you can adjust the level of the light to your taste.
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    Default Re: Very bright planets (I can't see any detail)

    Quote Originally Posted by FelipeCR View Post
    Hi all!!
    Recently I bought a telescope Meade Polaris 130mm f / 5, to observe DSO has resulted in a very good telescope, being able to see even M1 in my neighborhood with some light pollution. But when I want to see planets these appear as a clear disk without any detail whatever the magnification; For example Saturn appears as a yellowish oval disk without distinguishing between the planet and the rings; And Jupiter appears as a white disk without. With Venus it is worse, it appears like a flash, without being able to see its form. In my other telescopes, a 60mm refractor and a 72mm reflector I could distinguish those details without problems. What can I do to improve this problem?
    Hello Felipe,

    I have the next size up in a Newtonian. It's just like yours, at f/5, but it's 150mm in diameter; an extra inch. Through mine, I see Jupiter and Venus as you do, too...

    Jupiter-Venus2.jpg

    As already suggested, the solution to that is a variable-polariser. This one would allow you to change out eyepieces at will, and without having to attach and remove it from each eyepiece...

    http://agenaastro.com/bst-1-25-teles...ce-holder.html

    You can adjust the level of light-throughput from only 2% to pass, or up to 40%, and simply by twisting one half against the other...

    variable polariser3a.jpg

    Not only will it dim down the brilliance and glare of the planets, but it will also reduce or even eliminate the diffraction-flares caused by the secondary spider-vanes...

    spider-vanes flares.jpg

    This collimation-cap... http://agenaastro.com/rigel-systems-...-eyepiece.html

    ...would allow you to see the entire optical system inside your Newtonian, and then to adjust as needed, with this being the scene from my own Newtonian, and well collimated...

    collimation1b.jpg

    Collimation instructions...

    http://www.forumskylive.it/Public/da...ollimation.pdf
    http://www.schlatter.org/Dad/Astronomy/collimate.htm

    A 2x or even a 3x barlow would help you reach the higher and highest of powers necessary for close planetary observations...

    http://agenaastro.com/gso-1-25-2x-ac...rlow-lens.html
    http://agenaastro.com/gso-1-25-3x-ed-barlow-lens.html

    Barlows can double the number of eyepieces within a set; and will allow you to use eyepieces of longer focal-length, with larger eye-lenses to observe through along with greater eye-relief.

    Have you thought about extra eyepieces and a barlow?

    Planetary observations, and observations in general, are made especially easier by motorising your EQ-2 mount...

    http://agenaastro.com/meade-polaris-...nt-616000.html

    ...and for automatic, hands-free tracking of any object in the sky. The Meade motor drive has an adjustable speed control; for the Sun, the Moon, the planets, the stars and the DSOs all traverse the night sky at different rates of speed.

    Clear skies!
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    Default Re: Very bright planets (I can't see any detail)

    Next purchase:
    -variable polarizing filter
    -Plossls EPs
    -UHC filter
    - I hope my wife does not get angry hahaha

    The Polaris Motor Drive already have it, I'm learning to adjust it better. I also find it hard to solve some binary for the same problem, but I hope that with this improvements I can enjoy more of my telescope. Thanks to all ...
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