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tiny optics messier marathon.

Discussion in 'General Astronomy Chat' started by kevan hubbard, Jun 14, 2016.

tiny optics messier marathon.

Started by kevan hubbard on Jun 14, 2016 at 11:14 AM

5 Replies 1523 Views 2 Likes

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  1. kevan hubbard

    kevan hubbard Well-Known Member

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    At last a clear night so stayed up and went to a field near my home guess you'd put it at urban/rural transition as far as light pollution goes.my aim was a messier marathon with my 5x10 Zeiss mini quick but I also had my Opticron 8x25 monocular too.the moon was nearly down at about 0100.sadly the little Zeiss didn't do well,m3 and m13 where the only ones I could see with it so only a bit better than the naked eye.the 8x25 however pulled up stuff like m27,m11,m24,m29,m39 and even m71.so there's,even with Zeiss optics, truth in the motto the more light you get in the more you see!
     
  2. bventrudo

    bventrudo Staff

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    It was a worthy effort. But even Messier had a 2" or 3" refractor (or equivalent), and waaaay darker skies than any of us.
     
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  3. jgroub

    jgroub Well-Known Member

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    Actually, he observed with a 4" refractor, but yeah, absolutely zero light pollution.
     
  4. kevan hubbard

    kevan hubbard Well-Known Member

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    It's interesting messier included things like m7,m6,m70,etc as these must be very low from Paris. My guess being that Scorpius 'sting'must scrape the horizon from Paris at around 49 degrees north.of course there would have been no light pollution then but due to the thickness of the atmosphere it'd still be hard to view objects so low.
     
  5. jgroub

    jgroub Well-Known Member

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    I wonder about this, too. Messier had an assistant, Mechain, who was a worthy astonomer in his own right. Perhaps Mechain had observed these objects from a more southerly location?

    On the other hand, M6 and M7 are among the brighter of the Messier objects, and M69 and M70 are globs, so even though they're dimmer than the first pair, they're still pretty densely packed, and are probably noticeable even through a 4" refractor in zero light population.
     
  6. kevan hubbard

    kevan hubbard Well-Known Member

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    My guess being that these very low objects where aspied from somewhere further south probably the south of France although travel in messiers day would not have been easy these days Paris Marseille is only about 3 hours by rail.you'd certainly see all of Scorpius from the south of France. Most European capitals are far to the north of their Asian and north American equivalents. My map tells me Europe only has three capitals under the 40th parallel, Lisbon, Valletta and Athens. I suppose you could add Gibraltar city if you count it as a country. Cyprus is geographically regarded as Asia although culturally European.
     

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