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Comet ISON Plunges Toward the Sun
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varice



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PostPosted: Wed Nov 27, 2013 1:21 am    Post subject: Comet ISON Plunges Toward the Sun
Subject description: and is Greeted by a Massive CME
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A fantastic celestial show is in progress about 93 million miles away in the direction of the Sun. Comet ISON is plunging toward the Sun at a velocity of about 200,000 MPH and will graze the Sun at less than 800,000 miles from the surface! If it survives this hellacious daredevil dip on the 28th of November (closest approach to the Sun known as perihelion) it will slingshot back into the deep space of the solar system from whence it came.

Comet ISON has come into the field of view of the LASCO C3 imager of the SOHO solar observatory satellite and was greeted by a large coronal mass ejection (CME) from the Sun. The attached image shows Comet ISON just as it enters the C3 frame at the far right and the CME exploding from lower right of the Sun. The Sun is at the center of the image and its sphere is represented by the white circle at the center.

The SOHO observatory should have excellent images of Comet ISON during the next few days, and should have some movies. The SDO observatory may also have some close up images and movies of Comet ISON near perihelion on the 28th of November.

Here are some suggested links that may be of interest:

SOHO link currently showing a time lapse movie of the Comet ISON approach and the CME (including other links with more info):

http://soho.nascom.nasa.gov/hotshots/index.html/

SDO Comet ISON perihelion images:

http://cometison.gsfc.nasa.gov/

Astronomy Magazine Comet ISON page:

http://www.astronomy.com/magazine/events/comet-ison


20131127_0141_c3-ISON.gif
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Comet ISON Plunges Toward the Sun and is Greeted by a Massive CME
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varice



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PostPosted: Wed Nov 27, 2013 10:58 am    Post subject: Reply with quote  Mark this post and the followings unread

It appears that the NASA SOHO site is getting overwhelmed with traffic. Here are some links to the ESA SOHO site:

http://soho.esac.esa.int/hotshots/index.html/

http://soho.esac.esa.int/data/realtime/c3/1024/latest.html

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PostPosted: Wed Nov 27, 2013 12:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for posting these links. This is good information.
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PostPosted: Wed Nov 27, 2013 12:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

Nice moving images :-)
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PostPosted: Thu Nov 28, 2013 3:51 am    Post subject: Reply with quote  Mark this post and the followings unread

http://spaceweather.com/images2013/28nov13/sundiver_anim.gif?PHPSESSID=5cqnh745uv17eo4l6g5cq6e8u1
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PostPosted: Thu Nov 28, 2013 2:17 pm    Post subject: Reply with quote  Mark this post and the followings unread

Well, after drifting around in the deep freeze of space for billions of years, it appears that this comet may have met its fiery death today…
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PostPosted: Thu Nov 28, 2013 5:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

varice wrote:
Well, after drifting around in the deep freeze of space for billions of years, it appears that this comet may have met its fiery death today…

Or not. http://spaceweather.com/images2013/28nov13/rip_anim2.gif?PHPSESSID=ggmelv44kk52e2ddqi2vcg9a63


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PostPosted: Thu Nov 28, 2013 11:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

Posted Image, might have been reduced in size. Click Image to view fullscreen.
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PostPosted: Fri Nov 29, 2013 7:44 am    Post subject: Reply with quote  Mark this post and the followings unread

Laughing
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PostPosted: Fri Nov 29, 2013 9:09 am    Post subject: Reply with quote  Mark this post and the followings unread

Johan Zwart wrote:
varice wrote:
Well, after drifting around in the deep freeze of space for billions of years, it appears that this comet may have met its fiery death today…

Or not...

Shocked Wow Exclamation It looks like something survived. But is the nucleus still intact? With great interest, I’m looking at each C3 image as it becomes available…

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PostPosted: Fri Nov 29, 2013 12:09 pm    Post subject: Reply with quote  Mark this post and the followings unread

"COMET ISON LIVES! Cancel the funeral. Comet ISON is back from the dead."
http://spaceweather.com/

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PostPosted: Sat Nov 30, 2013 12:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

Whatever came out after perihelion appears to have only been the ghost of ISON. It is now fading fast in the SOHO LASCO C3 images without any sign of a new coma forming. This doesn’t look good for any hopes of a bright Comet ISON gracing December skies. I was hoping for a great show, but I don’t feel optimistic at this point. Sad Oh well…
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PostPosted: Mon Dec 02, 2013 9:45 am    Post subject: Reply with quote  Mark this post and the followings unread

http://isoncampaign.org/karl/in-memoriam

In Memoriam

Submitted by Karl Battams on Mon, 12/02/2013 - 08:32

Comet C/2012 S1 (ISON)
Born 4.5 Billion BC, Fragmented Nov 28, 2013 (age 4.5-billion yrs old)

Born in a dusty and turbulent environment, comet ISON spent its early years being jostled and struck by siblings both large and small. Surviving a particularly violent first few million years, ISON retreated to the Oort Cloud, where it maintained a largely reclusive existence for nearly four billion years. But around 3-million B.C., a chance encounter with a passing star coerced ISON into undertaking a pioneering career as a Sungrazer. On September 21, 2012, ISON made itself known to us, and allowed us to catalog the most extraordinary part of its spectacular vocational calling.

Never one to follow convention, ISON lived a dynamic and unpredictable life, alternating between periods of quiet reflection and violent outburst. However, its toughened exterior belied a complex and delicate inner working that only now we are just beginning to understand. In late 2013, Comet ISON demonstrated not only its true beauty but a surprising turn of speed as it reached its career defining moment in the inner solar system. Tragically, on November 28, 2013, ISON's tenacious ambition outweighed its ability, and our shining green candle in the solar wind began to burn out.

Survived by approximately several trillion siblings, Comet ISON leaves behind an unprecedented legacy for astronomers, and the eternal gratitude of an enthralled global audience. In ISON's memory, donations are encouraged to your local astronomy club, observatory or charity that supports STEM and science outreach programs for children.

This is how comet C/2012 S1 (ISON) wished to be remembered. [Image credit: Damian Peach]:


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This is how comet C/2012 S1 (ISON) wished to be remembered. [Image credit: Damian Peach]
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