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Thread: Observing Report for 10 January 2019 - cloud dodging continued

  1. #11
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued



    Nice! I'm amazed that you managed to pull off Caelum seeing it's so low ( had to see where is using Stellarium!) I'd never be able to see it in my sky because of the houses.

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  3. #12
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued

    Quote Originally Posted by bladekeeper View Post
    Yeah, I was forced to set up in the driveway last Friday and Saturday night due to soggy and fully saturated yard. The mole tunnels were rather dangerous.

    Best skies I'd seen in several months and I had to sit in amongst the porch and street lights.

    Close Encounters is exactly what that reminded me of.
    I could definitely see the risk with mole tunnels! As far as the lights, I suppose its kinda like me here, I either set up in the light or I do without!

    Quote Originally Posted by Don Quixote View Post
    Thank you once again Alan for this outing.
    I have printed it out and attempted to follow in SS5. :-)
    5 inches of snow this morning and steely grey skies for now.
    Keep this fine reports coming...it is all some of us gave. :-)

    And I will throw a nice snowball your way... :-)
    Thank you Mark. We have snow headed in back home and likely more than your 5 inches. If you throw a snowball my way presently, it would melt before it hit the ground!

    Quote Originally Posted by AbbN View Post
    Nice! I'm amazed that you managed to pull off Caelum seeing it's so low ( had to see where is using Stellarium!) I'd never be able to see it in my sky because of the houses.

    Abb
    Thanks Abb. You have to remember, I am at 5 south latitude, so Caelum is a piece of cake here, if the sky is clear that is. Actually it fully clears the horizon at home (around 38 north), but usually I could at best see the northern half. I picked up the galaxy NGC 1679 and asterism Streicher 19 in Caelum from our dark site using the 12 inch a couple of years ago. Given its low altitude at home, I needed the darker skies to see much.
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued

    Great report Alan!
    I always enjoy the history you include about who really discovered the target and who had it wrong. That is the kind of stuff that really adds depth to our hobby.

    We had some clear weather during the week, but my work schedule didn’t allow anytime to get out. I have been running the work-eat-sleep schedule.
    I have been dying to get back out to the spot I explored last weekend. The club members also got permission to use some property that is even a tad darker a little further away.
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued

    Quote Originally Posted by Prowler75 View Post
    Great report Alan!
    I always enjoy the history you include about who really discovered the target and who had it wrong. That is the kind of stuff that really adds depth to our hobby.

    We had some clear weather during the week, but my work schedule didnt allow anytime to get out. I have been running the work-eat-sleep schedule.
    I have been dying to get back out to the spot I explored last weekend. The club members also got permission to use some property that is even a tad darker a little further away.
    Thank you Craig. I have always found the history of visual observing an intriguing subject. The dedication of the early pioneers to scour the sky night after night in search of stars and objects in an attempt to make sense of the universe before them is something to be admired. Of course humanity's understanding of the nature of the universe as a whole was very much in its infancy, when speculations and opinions were quite diverse with little to no ability to be proven.

    But they paved the road for those who came later as technology advanced to the point that we could begin to understand the true nature of what lay out there. Of course with such knowledge, some of the earlier ideas and discoveries began to come apart, as objects were not always what the discoverer may have assumed them to be.

    I became interested in James Dunlop as I began to pay more and more attention to the southern sky. Of course, I found that his lack of formal training led him to making many errors in his documentation. His positions were many times off, and some of his objects were never found. But despite being much maligned by contemporaries, particularly after his death, a good deal of his work has been proven and his contribution to the study of the southern skies better understood and respected. If you care to read more about him, you can take a look at the following paper.

    http://articles.adsabs.harvard.edu/c...;filetype=.pdf
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued

    Thanks for your nice report. It is amazing how much you can see under rather (for you) unknown skies with a modest aperture. I sure liked the steps you described in order to capture those faint galaxies.
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued

    Thank you John. It can be a curious thing sometimes to work in parts of the sky that one either can't see at home, or at least not spend a lot of time in due to low elevation. The lure of the unknown I suppose.
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued

    Quote Originally Posted by KT4HX View Post
    Thank you Craig. I have always found the history of visual observing an intriguing subject. The dedication of the early pioneers to scour the sky night after night in search of stars and objects in an attempt to make sense of the universe before them is something to be admired. Of course humanity's understanding of the nature of the universe as a whole was very much in its infancy, when speculations and opinions were quite diverse with little to no ability to be proven.

    But they paved the road for those who came later as technology advanced to the point that we could begin to understand the true nature of what lay out there. Of course with such knowledge, some of the earlier ideas and discoveries began to come apart, as objects were not always what the discoverer may have assumed them to be.

    I became interested in James Dunlop as I began to pay more and more attention to the southern sky. Of course, I found that his lack of formal training led him to making many errors in his documentation. His positions were many times off, and some of his objects were never found. But despite being much maligned by contemporaries, particularly after his death, a good deal of his work has been proven and his contribution to the study of the southern skies better understood and respected. If you care to read more about him, you can take a look at the following paper.

    http://articles.adsabs.harvard.edu/c...&filetype=.pdf
    That is a neat paper on James Dunlop, thanks for sharing it! Man, Herschel must have really been frustrated over the inaccuracies to include this about him in the introduction to his own catalog:

    “I cannot help concluding that, at least in the majority of those cases, a want of sufficient light or defining power in the instrument used by Mr. Dunlop, has been the cause of his setting down objects as nebulae where none really exist.”
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued

    Nice collection of southern sky targets Alan!
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued

    Hi Alan,

    Very nice report sir! I have only observed from my backyard and not ever from a different location. Definitely not from another hemisphere!
    Some great catches on dim targets. Very enjoyable read, thanks.
    Nice to have you visit with us so far from home.

    Take care,
    Jim
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    Default Re: Observing Report for 10 January 2019 - cloud dodging continued

    Quote Originally Posted by Prowler75 View Post
    That is a neat paper on James Dunlop, thanks for sharing it! Man, Herschel must have really been frustrated over the inaccuracies to include this about him in the introduction to his own catalog:

    “I cannot help concluding that, at least in the majority of those cases, a want of sufficient light or defining power in the instrument used by Mr. Dunlop, has been the cause of his setting down objects as nebulae where none really exist.”
    Thanks Craig and glad you enjoyed it. I can well imagine that JH was indeed frustrated because in those cases where he spent time hunting only to come up empty-handed was a waste of productive time. But, that was part of the game, he still had to validate for the sake of accuracy. However, in some cases it was merely a positional error, something that JH certainly was not immune to in his work as well.

    I am certain that the differences between Dunlop's 9 inch reflector and JH's 18.7 inch reflector (his father's scope) certainly had something to do with it, as JH was working with about double the resolving capability and four times the light gathering. So I think many of those that Dunlop incorrectly identified as nebulae were likely a mixture of averted imagination and the inability to resolve a small dim group of stars, which would appear nebulous due to their combined light. That is why I myself take great pains when observing threshold objects to be totally convinced that I've seen it or it doesn't go in the log. Our eyes are wonderful instruments, but they can be fooled when it comes to very dim objects.

    In the end of it all, I think JH handled it poorly. Instead of maligning, he could have praised Dunlop for his overwhelmingly positive achievements and contributions. However, I am certain a level of arrogance was involved. After all, JH comes from a storied family and had tutelage at the hands of his father and aunt Caroline, as well as formal training. Whereas Dunlop was a mere citizen scientist. But it is what it is, but I for one am far more impressed by Dunlop's contributions than I am put off by his failures.


    Quote Originally Posted by Bigzmey View Post
    Nice collection of southern sky targets Alan!
    Thank you Andrey.

    Quote Originally Posted by Juno16 View Post
    Hi Alan,

    Very nice report sir! I have only observed from my backyard and not ever from a different location. Definitely not from another hemisphere!
    Some great catches on dim targets. Very enjoyable read, thanks.
    Nice to have you visit with us so far from home.

    Take care,
    Jim
    Thank you Jim. I would say the majority of us only get to observe from our backyards or perhaps a darker site within driving distance. I feel fortunate that I do get the opportunity once in a while to peer below my normal horizon to see wonders that many only read about. I am more than happy to share my experiences as a northern observer looking at a more southern view. However, I certainly do wish I had access to the apertures that I do at home!
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