Tom;
That is best set of images of this object I have ever seen. I love that you
can see the shadow start out from R Mon and then move across the nebulosity.Â
I let it run over and over, smiling all the time.
Steve Coe
On Saturday, April 30, 2016 8:35 PM, Tom Polakis <tpolakis@xxxxxxx> wrote:
http://www.pbase.com/polakis/image/163069532/original
The fan-shaped cloud that extends northward from the bright, illuminating star
(R Monocerotis) in this frame is called Hubble's Variable Nebula. As dust
swirls in the immediate vicinity of the star, it casts shadows on the walls of
the large shell, resulting in an ever-changing appearance.
This time-lapse GIF uses images that I have taken about weekly for the past six
months.
It will be too close to the sun to observe for the next three months, but will
return in the pre-dawn sky in August.
Images were taken with a 12 1/2" f/6.7 Dall-Kirkham telescope from my backyard
in Tempe. They are typically averaged 5-minute exposures with an SBIG STXL-6300
camera that produces an image scale of 0.88 arcseconds per pixel. I doubled the
image scale in post-processing so viewers don't have to lean into the display
so much.
Yet again, I'd like to thank Mike Collins for doing 80 percent of the work
building my backyard observatory, without whom all of this would not have been
necessary.
Tom
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