[NLRS] ISON update -- not good
Dr. Gerald N. Johnson
geraldj at netins.net
Sat Nov 30 18:48:29 EST 2013
I had a clear sky this morning a half before sunrise, but the sky was
already bright and the sunrise opposite a cedar grove to my SE as
pointed to by the crescent moon. Ison is too close to the sun for
practical viewing, Halley was hard enough but I saw it twice. Timing was
important and it took a telescope evening and morning. I don't know for
sure where the pieces are but back then I used a 400 mm manual
controlled lens that had a universal 35mm camera thread mount. F3.5 and
I made a mount for a 10X or 20X microscope eyepiece. There was only a
few minutes where Halley was above the horizon and the sky dark enough
for it to show.
At the end of the video, Ison was paler than the stars it was passing.
At this rate of fading the space solar telescopes won't be able to find
it in 24 hours.
73, Jerry, K0CQ
On 11/30/2013 4:26 PM, Donn, WA2VOI wrote:
>
>
> From: http://www.spaceweather.com/ late afternoon 30 Nov 2013. PIX and
> coronagraph movie at the web site.
>
> "Comet ISON dies...again. Comet ISON is fading fast as it recedes from
> the sun. Whatever piece of the comet briefly survived its Thanksgiving
> Day brush with solar fire is now dissipating in a cloud of dust. Click
> to view a 3-day movie centered on perihelion (closest approach to the sun):
>
> "This development makes it unlikely that Comet ISON will put on a good
> show after it exits the glare of the sun in early December. Experienced
> astrophotographers might be able to capture the comet's fading "ghost"
> in the pre-dawn sky, but a naked-eye spectacle is out of the question.
> "On Nov. 29th, pilot Brian Whittaker tried to catch a first glimpse of
> Comet ISON from Earth, post-perihelion, from a plane flying 36,000 feet
> over the Arctic Circle in northern Canada. No luck:
>
> "Ideal viewing conditions from the Arctic revealed no Comet ISON,"
> reports Whittaker. "This negative report is to quench the thirst of
> other fellow dreamers under cloudy skies or further south. Later I could
> see that SOHO showed the comet dimming further."
>
> "Despite Whittaker's negative result, it is too soon to rule out
> observations from Earth as the twice-dead comet moves away from the
> glare of the sun. Meanwhile, NASA's fleet of solar observatory will be
> tracking the remains. Stay tuned for more images.
>
> 73 Donn
> WA2VOI/0
>
>
>
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