[AZ-Observing] Re: Archinal 1
- From: Howard Anderson <handy13@xxxxxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Fri, 11 Jul 2014 06:57:43 -0700
Hi Brian,
Just getting back to this...
"...digitized sky survey images..." would include:
http://archive.stsci.edu/cgi-bin/dss_form?
That one shows a cluster where your
coordinates show it to be...
There are lots of "digitized sky survey" sites that come
up in a Google search.
The "ESO Online Digitized Sky Survey" apparently
does not cover this area?
Almost everything I have imaged is "outside the SDSS
footprint" (http://skyserver.sdss3.org/dr10/en/tools/chart/image.aspx)
so it has not been of much help to me...
Just wondering which "digitized sky survey" you use.
Thanks,
Howard
http://www.astroshow.com
Brian Skiff wrote:
>On Sun, 2014-07-06 at 11:27 -0700, Howard Anderson wrote:
>
>
>
>>I "moused around" in two different browsers and nothing happened.
>>I finally found this: http://www.astrodwarf.com/deep-sky/detail/8215
>>which says coordinates of Archinal 1 are:
>>RIGHT ASCENSION: 18h 54m 32.82s
>>DECLINATION: 5° 33â² 68.4â³
>>
>>
>
>Looks as though somebody's got the position of
>the cluster wrong. Surely the clump a couple
>arcminutes to the northwest is the intended object.
>A better position is: 18 54 50 +05 33.0 (J2000).
> "astrodwarf" also needs to do something about
>coordinates conversion or something to deal with
>the 68.4 arcseconds end-figures in the Dec.
>
>
>
>
>>I wonder how somebody decided that was a "cluster?"
>>There is an almost better candidate of 5 slightly brighter
>>tightly grouped stars to the left.
>>
>>
>
> A look at digitized sky-survey images
>across the visible plus the 2MASS near-IR images
>suggests to me this is an "absorption hole"
>in the dark clouds in this area quite evident in
>the blue-light DSS images, but which disappear in
>the near-IR. So probably no physical cluster here.
>As Richard Harshaw suggests, it probably nevertheless
>a fair visual deep-sky object given plenty of
>aperture and high magnification.
>
>
>\Brian
>
>
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