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Thread: Observing Report for 27 January 2019 - dove droppings from a viscous sky

  1. #11
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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky



    You got me there Alan. While reading your report I was waiting for doves (or at least dove droppings) to drop on you. I was relieved but also a bit disappointed that it did no happen.

    From the Anza site I logged a couple of galaxies NGC 1792, NGC 1808 and glob NGC 1851, but not any clusters existing or imaginary.

    BTW DSO Browser lists NGC 2061 as asterism and shows the trapezium of bright stars you have described. So, your take on this is that RA/Dec are logged incorrectly in NGC?
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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky

    Quote Originally Posted by sketrip View Post
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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky

    Thanks for your extensive search for NGC2061. Not the first time an amateur points out errors in atlases. But very nice to discover one!
    It seems that Sky Safari Pro and Stellarium Web point erroneously at the described trapezoid too. In your description NGC2061 seems to be centered halfway between the trapezoid and NGC2090 in the same 1 degree field. Is that right? I think I found at least some of the described members of NGC2061 over there. ( In SSPro that is).

    Nice piece of work and investigation!
    Thanks for your report, which gave me a bit of "red ears" in trying to locate the "lost boy" in the atlases.
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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky

    Quote Originally Posted by Bigzmey View Post
    You got me there Alan. While reading your report I was waiting for doves (or at least dove droppings) to drop on you. I was relieved but also a bit disappointed that it did no happen.

    From the Anza site I logged a couple of galaxies NGC 1792, NGC 1808 and glob NGC 1851, but not any clusters existing or imaginary.

    BTW DSO Browser lists NGC 2061 as asterism and shows the trapezium of bright stars you have described. So, your take on this is that RA/Dec are logged incorrectly in NGC?
    Thanks Andrey. Obviously the only dove involved was Columba. The droppings were the pathetic clusters I was able to extract through a poor sky.

    Yeah, I was aware that DSO Browser lists it as an asterism, and shows an image of the wrong field. The opinion of its position is not just my opinion, but also that of Brent Archinal and Stephen Hynes, authors of Star Clusters. An excellent book by the way, and a source I highly recommend. The Optically Visible Open Clusters and Candidates database maintained by Wilton S. Dias also agrees with the coordinates of RA 05h 44m 6s, Dec -33° 56' 6", those listed by Archinal and Hynes. This is the field I concentrated on in my observations, though I clearly saw the trapezoid of brighter stars to its west toward Phact.

    The descriptor listed in the original NGC is "Cl, L, lC, st 13", which translates to Cluster, Large, little Compressed, stars of 13th magnitude. To my thinking that more closely matches Herschel's description than does the brighter trapezoid of stars to the west.

    Ultimately this is just another example of questionable data in the original NGC. Of course the RNGC lists it as a non-existent object in the context that they were unable to detect it in the POSS plates. But I have many times seen clusters that the RNGC tags as non-existent to clearly be detectable visually. Though granted they are often poor, but not in every case.

    Regarding your observations of NGC 1792 and 1808, they are a fine pair. They along with NGC 1827, NGC 2090, IC 2135 and ESO 362-11 form the galaxy group LDC 384. This group of "Low Density Contrast" galaxies was identified in the 2MASS Redshift Survey in 2007 based on their similar redshifts.
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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky

    Quote Originally Posted by John Baars View Post
    Thanks for your extensive search for NGC2061. Not the first time an amateur points out errors in atlases. But very nice to discover one!
    It seems that Sky Safari Pro and Stellarium Web point erroneously at the described trapezoid too. In your description NGC2061 seems to be centered halfway between the trapezoid and NGC2090 in the same 1 degree field. Is that right? I think I found at least some of the described members of NGC2061 over there. ( In SSPro that is).

    Nice piece of work and investigation!
    Thanks for your report, which gave me a bit of "red ears" in trying to locate the "lost boy" in the atlases.
    Thank you John. Actually, its position is closer to the trapezoid. The center of the field lies 15' 7" east of the northeastern corner star of that pattern. Also the center of NGC 2061 is 41' 9" northwest of NGC 2090. The three brightest stars of the cluster (?) form a scalene triangle pointed to the southwest. That is the field that I was observing. Hope that helps pinpoint it better. I would attach a chart if I could.
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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky

    Nice work dogging the clouds to catch a few objects, Alan. Great write up of them too!
    Post observing research is something I need to start doing.
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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky

    Excellent reporting, Alan!

    You made some hay out of a poor hayfield, so pretty darn good, I reckon. I enjoyed the research you put into this one.

    I can get a sky around here to save my neck. CO keeps telling me I'll have a good sky while the other forecasting applications tell me otherwise. Right now CO says I should be out in the yard with my eyepiece hovering over glass, but I've got soup-filled sucker holes and thicker striations of cloud turds, all herded in a southerly direction by a 20 mph wind pushing 23° F air around. An occasional gust is rattling the window panes.

    I'm about ready to drape a quilt around some tripods to make a tent and go sit in it.

    Great read, my friend.
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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky

    Good to see you back out under southerly skies Alan! Your report is tempting me to get back out again and seek some new asterisms.

    I'm housebound the next 2.5 wks, because of a trip to Spain that fell through because of my pneumonia (stay at home vacation instead). I've had an observing hiatus of almost 3 mos. because I was studying Spanish.
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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky

    Quote Originally Posted by Prowler75 View Post
    Nice work dogging the clouds to catch a few objects, Alan. Great write up of them too!
    Post observing research is something I need to start doing.
    Thank you Craig. Usually when doing my write up is when I start to find discrepancies, either in catalogue designations, magnitudes, angular sizes and even in positions. I find all that a fascinating study actually and at least for myself, it adds more depth to what may have otherwise been a poor observational experience.

    Quote Originally Posted by bladekeeper View Post
    Excellent reporting, Alan!

    You made some hay out of a poor hayfield, so pretty darn good, I reckon. I enjoyed the research you put into this one.

    I can get a sky around here to save my neck. CO keeps telling me I'll have a good sky while the other forecasting applications tell me otherwise. Right now CO says I should be out in the yard with my eyepiece hovering over glass, but I've got soup-filled sucker holes and thicker striations of cloud turds, all herded in a southerly direction by a 20 mph wind pushing 23° F air around. An occasional gust is rattling the window panes.

    I'm about ready to drape a quilt around some tripods to make a tent and go sit in it.

    Great read, my friend.
    Much appreciated Bryan. Being reliant upon the sky and weather conditions for a hobby certainly creates a mixed bag of results. But it is the way we've chosen to spend our leisure time so deal with it we must.

    Don't get me started on CO! I cannot recall the number of times I've seen it say it was 100% cloudy at a given moment only to step out and see the sky totally clear, and vice versa. I know sometimes we have to kind of plan around what the forecasters predict, but I swear sometimes I've wondered if there was a method similar to dowsing to see if I can find a better way! Use a divining rod and if it points up, rain is on the way!

    Good luck with your camping trip!

    Quote Originally Posted by terrynak View Post
    Good to see you back out under southerly skies Alan! Your report is tempting me to get back out again and seek some new asterisms.

    I'm housebound the next 2.5 wks, because of a trip to Spain that fell through because of my pneumonia (stay at home vacation instead). I've had an observing hiatus of almost 3 mos. because I was studying Spanish.
    Thanks Terry. I hope the temptation does motivate you to get back out there. Pneumonia is certainly not a fun way to have a vacation! Sorry the trip did not pan out, but I would imagine others are in the plans for a later time to make up for it!

    Maybe you should plan a trip to the Atacama Lodge in Chile. They even have telescopes to rent, and your Spanish will come in handy as well.

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    Default Re: Observing Report for 27 January 2019 - dove droppings from a viscous sky

    center of NGC 2061 is 41' 9" northwest of NGC 2090. The three brightest stars of the cluster (?) form a scalene triangle pointed to the southwest.
    Yip, that helps. Found it. SSPro gives the right position. Uranometria 2000 too.
    Thanks!
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