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Thread: Only nebulas I can find

  1. #1
    Nomma's Avatar
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    Default Only nebulas I can find



    Okay so I've logged many of hours now with the 4.5inch and I have found Andromeda and the double galaxies near dhurml. I have seen the crab nebula and Orion... I have found almost all of the clusters and galaxies that are viewable from my location running from 7pm to midnight. Yet I cannot see any of the nebulas other than Orion and crab. Orion shows as a horse shoe blue and green fog with a little white. On a good night it will almost fill the gap between the upper and lower star. Crab nebula just looks like a globular cluster to be honest no colors just looks like a ball of dust.

    My question is what am I doing wrong.. I should be able to easily see little dumbbell or owl possibly flame nebula??

    There is one area that I thought was little dumbell but it's just too big it's above m101 and above the salt and pepper it's a set of two semi circle rings facing away from each other with a blue haze. But it's too far right of where little dumbell should be so I think it's the double cluster that's below Perseus.

    Any advice would be awesome. A list of nebula that you should be able to see if you can see the fog and trapezium of Orion would be great.
    Mike.
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    Default Re: Only nebulas I can find

    If you are seeing color on Orion's nebula with a 4.5" reflector, you are doing GREAT!! Most people see no color at all associated with it, and those that do are usually using 10"+ of aperture. I have seen hints of color using my 12" Dob, but never with a smaller scope. I've never seen color associated with the Crab nebula and the only time I've heard of it was with very large (18"+) Dobs.

    Easily see the Little Dumbbell, Owl, and Flame nebulas, not likely with your scope unless you are in very dark skies and have trained your eye to see such things. The Little Dumbbell is probably the easiest to see of the three, but it is SMALL and dim. We are talking about slight differences in contrast, so it may be helpful for you to get a Celestron UHC filter. It is promoted as a "light pollution" filter which is a misnomer to me, but it does help with contrast differences on certain emission and reflection nebulae. It does have a dimming effect you will see on stars (you can't see as many of them), but helps (slightly, which is often enough to make out dim nebulae) on the contrast between the nebulae and the background.

    But dark skies and experience will be your biggest help. Keep at it.

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    Default Re: Only nebulas I can find

    My skies are pretty dark for instance if you take Perseus I can see a glow between all the stars that come up and make the hook and where it hooks is a dark grey blue against a black sky. Peledis is fully visible as a very small little Dipper shape with the naked eye.
    But you touched on something I was curious about filters.. and what filters I should be getting for dso viewing.
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    Mike.
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    Default Re: Only nebulas I can find

    Filters can be an invaluable tool for certain nebulae, but their use on the whole is usually quite infrequent. They take a trained eye to garner much benefit and many inexperienced observers are disappointed with them at first, but gradually learn to make out the subtle differences. As you are learning to observe now, throw a nebula filter in there and you have to start learning to observe the object in a "new light", and it takes time. But the right filter can certainly help you with this, but also take into account that filters work best on large aperture scopes (they only take away and do not add anything).

    I have found that a fairly good test of dark skies is if the Andromeda Galaxy is a naked eye object.

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    Default Re: Only nebulas I can find

    Honestly not sure if I can see Andromeda or not. I lean towards no but once I have my scope on it then look in that area I think I can then I can't kinda thing like its ghosting in and out lol. I have no idea if that makes sense
    Mike.
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    Default Re: Only nebulas I can find

    Quote Originally Posted by Nomma View Post
    Honestly not sure if I can see Andromeda or not. I lean towards no but once I have my scope on it then look in that area I think I can then I can't kinda thing like its ghosting in and out lol. I have no idea if that makes sense
    Makes a lot of sense, it is on the edge of perception and you are currently training your eyes to make out these faint differences.

    At my dark site, at times M31 is just as you describe, in and out of visual perception. Sometimes it's blatantly obvious, and sometimes it can't be seen naked eye at all. This gives me a good measure of the transparency.

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    Default Re: Only nebulas I can find

    Alright! +1 for me and growth haha
    Mike.
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    Default Re: Only nebulas I can find

    Good luck Mike!
    Michael
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    Default Re: Only nebulas I can find

    Ty ty (: . I can say I confirmed that Andromeda is a little haze through the finder scope.
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    Mike.
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    Default Re: Only nebulas I can find

    Hi. Do not expect to see colors in deep sky objects when viewing with your eyes. At night, the cones in our eyes (the color receptors) do not receive enough photons to activate their color pigment receptors, so they "wash out". Our eyes rely on our rod receptors for night vision, but unfortunately, they have no color receptor pigments.
    Cameras sensors do not have this shortcoming. Printed and posted images taken with cameras and that have had their colors (and other things) manipulated via software is what many newcomers to astronomy expect to see thru their own scopes, until experience (and reality) sets in. Nonetheless, astronomy is a great hobby to have and is rewarding for the amateur even if only in black and white. Your tax dollars help pay for the beautiful, color images on NASA's site. They are ours to enjoy as well.
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