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Thread: Asterisms Near the Omega Nebula

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    Default Re: Asterisms Near the Omega Nebula



    I agree on Swan Nebula. Last night, thin cloud cover and heavy light pollution washed it out for the 1st since I started viewing it. It even washed out the Andromeda Galaxy! That was hard for me to comprehend. For some reason, I got a good view of Saturn.
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    Default Re: Asterisms Near the Omega Nebula

    Quote Originally Posted by Frisky View Post
    I agree on Swan Nebula. Last night, thin cloud cover and heavy light pollution washed it out for the 1st since I started viewing it. It even washed out the Andromeda Galaxy! That was hard for me to comprehend. For some reason, I got a good view of Saturn.
    Joe, what you were dealing with was poor transparency caused by the thin clouds. In turn, this caused an increase of the sky glow associated with your LP because the light becomes more scattered in the atmosphere. Extended objects such as M17 and M31 require good transparency and dark skies to display their best qualities. Because they are of larger angular size, their light is spread out more and thus are more susceptible to poor transparency and increased sky glow from LP. Their light must overcome the increased sky glow and poor transparency to be seen to advantage.

    Saturn on the other hand will be noticeably less impacted by the conditions you were having. It is not unusual that on nights of poor transparency, that astronomical seeing is good. The moon, planets, brighter planetary nebulae and star clusters are less impacted by weak transparency.

    If you have not already, I invite you to read my older article about the importance of various factors when it comes to observing galaxies (and other extended objects). It can be found at the below link. Good luck with your observing.

    Why Can't I See That Galaxy?
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    Default Re: Asterisms Near the Omega Nebula

    I'll check out the article. That'll be interesting. Thanks for the explanation on transparency. It's just what I thought. One thing I noticed concerns the Triangulum Galaxy. Even on a moonless night, with clear viewing, the in-town skyglow hides it from me. It's the only object I've looked for and can't find. I'll find it this week when I go out into the countryside at my brother's place. He's just a hair shy of Bortle 3 and I'm at Bortle 6 here.

    Joe
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    Default Re: Asterisms Near the Omega Nebula

    One more thing about the current atmosphere. I checked to see if smoke from the western wildfires could have drifted to MN, as it seems hazier than it should be and the moon is a deep yellow. Sure enough, smoke is right through here! I think it has added to the decrease in view.

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    Default Re: Asterisms Near the Omega Nebula

    Quote Originally Posted by Frisky View Post
    I'll check out the article. That'll be interesting. Thanks for the explanation on transparency. It's just what I thought. One thing I noticed concerns the Triangulum Galaxy. Even on a moonless night, with clear viewing, the in-town skyglow hides it from me. It's the only object I've looked for and can't find. I'll find it this week when I go out into the countryside at my brother's place. He's just a hair shy of Bortle 3 and I'm at Bortle 6 here.

    Joe
    You will have no problem finding M33 from a Bortle 3 location, provided its clear. At our second home located in a dark area that varies around Bortle 2 and 3, it can be be glimpsed naked eye with averted vision. In 10x50 binoculars it is bright and large. At our primary home, which is in a typically Bortle 5 area it is still easy with the binoculars, but it is much more subdued. If conditions are poor, it will play hide and seek.

    The one thing people should remember about the Bortle scale is that its variable unlike the static light pollution maps. They are based on differing criteria though they both attempt to quantify your local sky conditions. But unlike the maps, the Bortle scale is meant as a tool to assess your conditions in real time using a set of specific criteria and can vary over the course of the evening.

    Good luck in your pursuit and you most definitely will see an exponential difference between your home and your brother's place, as I do going from our home to our dark site.
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    Default Re: Asterisms Near the Omega Nebula

    I'll report on my M33 search this week, as I'm heading out of town for sure. Another object I'm interested in seeing under darker skies is the Wild Duck Cluster. I see it fairly well at Bortle 6, so I think it's going to be subtly spectacular in darker skies.

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    Default Re: Asterisms Near the Omega Nebula

    Quote Originally Posted by Frisky View Post
    I'll report on my M33 search this week, as I'm heading out of town for sure. Another object I'm interested in seeing under darker skies is the Wild Duck Cluster. I see it fairly well at Bortle 6, so I think it's going to be subtly spectacular in darker skies.

    Joe
    M11 will be a naked eye object at your dark site. As should M6, M7, M8, perhaps M20, M22 and several other Messier objects. Definitely good targets for binoculars. Have fun.
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    Default Re: Asterisms Near the Omega Nebula

    I will take binoculars with me too. The last two nights, sky glow was so bad, it totally hid the Pleiades, but not from binoculars! Then I zoomed in with my scope. I also had a really nice view of the Double Cluster tonight!
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