Comet C/2012 S1 - ISON

[Laura]

No sign of comet after pass around sun: scientists
http://www.reuters.com/article/2013/11/28/us-space-comet-idUSBRE9AQ11E20131128

By Irene Klotz

Thu Nov 28, 2013 3:34pm EST


A comet's 5.5-million-year journey to the inner solar system apparently ended during a suicidal trip around the sun, leaving no trace of its once-bright tail or even remnants of rock and dust, scientists said on Thursday.

The comet, known as ISON, was discovered last year when it was still far beyond Jupiter, raising the prospect of a spectacular naked-eye object by the time it graced Earth's skies in December.

Comet ISON passed just 730,000 miles (1.2 million km) from the surface of the sun at 1:37 p.m. EST/1837 GMT on Thursday. Astronomers used a fleet of solar telescopes to look for the comet after its slingshot around the sun, but to no avail.

"I'm not seeing anything that emerged from the behind the solar disk. That could be the nail in the coffin," astrophysicist Karl Battams, with the Naval Research Laboratory in Washington, said during a live broadcast on NASA TV."

"It's sad that it seemed to have ended this way, but we're going to learn more about this comet," he added.

At closest approach, the comet was moving faster than 217 miles per second(350 km per second) through the sun's atmosphere.

At that distance, it reached temperatures of 5,000 degrees Fahrenheit(2,760 degrees Celsius) - hot enough to vaporize not just ices in the comet's body, but dust and rock as well.

If the comet or any large fragments survived the close encounter with the sun, they would be visible to the naked eye in Earth's skies in a week or two....

 

[Laura]

Comet ISON vanishes as it circles the sun
http://www.france24.com/en/20131129-comet-ison-vanishes-it-circles-sun

29 November 2013 - 01H25

AFP - Comet ISON appears to have flown too close to the surface of the sun Thursday and vanished as it circled the fiery surface, astronomers said.

The large block of ice and rock had been expected to skim just 730,000 miles (1.17 million kilometers) above the sun's surface around 1830 GMT.

It was estimated that ISON would undergo temperatures of 4,900 degrees Fahrenheit (2,700 Celsius) and lose three million tonnes of its mass per second as it made its journey around the sun.

Most astronomers had predicted that ISON would not survive the trip.

Several solar observatories watched the comet during its closest approach to the sun, known as perihelion.

And the comet became faint while still within view of NASA's Solar Terrestrial Relations Observatory, and the joint European Space Agency and NASA's Solar and Heliospheric Observatory.

NASA's Solar Dynamics Observatory, however, could not see the comet.

"It does seem that comet ISON probably has not survived its journey," Naval Research Laboratory comet scientist Karl Battams said after looking at space images....

 

[Laura]

Is Comet ISON Dead? Astronomers Say It’s Likely After Icarus Sun-Grazing Stunt
http://www.universetoday.com/106813/is-comet-ison-dead-astronomers-say-its-likely-after-icarus-sun-grazing-stunt/

by Elizabeth Howell on November 28, 2013

Sungrazer Comets @SungrazerComets
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Alright we're calling it, and you heard it here first: We believe some small part of #ISON's nucleus has SURVIVED perihelion.
3:46 AM - 29 Nov 2013

Update, 9:55 pm EST: It’s a Thanksgiving miracle: apparently it now looks like ISON has actually survived!!

Update, 8:35 p.m. EST: Uncertainty about Comet ISON’s fate likely will persist for some time. Karl Battams just tweeted that after 2,000 sungrazing comet observations, he has never seen brightening in the same way that ISON (or its remains) appear to be doing right now. We’ll keep watching. Real-time images are available on this website.

 

[Cosmos]

If you searh here between the time frame of 27.11.2013 until now http://soho.esac.esa.int/cgi-bin/data_query, and display a movie from Lasco C2 or Lasco C3, it looks to me that something has survived from ISON. Although it might be several fragments now?

 

[Laura]

Back from dead? Hope revives for 'comet of the century Ison' after encounter with Sun
http://www.independent.co.uk/news/science/comet-ison-can-comet-of-the-century-survive-close-encounter-with-the-sun-8969061.html

...Images from Nasa spacecraft showed the comet approaching for its slingshot around the sun today - but nothing emerging from the other side, suggesting it had been burned up on its journey.

However, recent pictures have suggested a brightening of what could be a small part of the comet, according to the BBC. This could continue brightening, or could simply fizzle out.

As the comet brushed past the Sun, it would have encountered temperatures of more than 2,700C (4,892F), enough to vaporise rock.

 

[Cosmos]

If you searh here between the time frame of 27.11.2013 until now http://soho.esac.esa.int/cgi-bin/data_query, and display a movie from Lasco C2 or Lasco C3, it looks to me that something has survived from ISON. Although it might be several fragments now?

Here is the latest image from Lasco C3:

I don't know how they can say that nothing of the comet appeared back directly after its close encounter. In the above link you can see clearly that something came out again which continues to brighten as it moves away from the sun. Even directly after it came into view again, something was visible.

I dunno...

Edit: I'm wondering what the new flight path is now?

 

[jupiterbeings]

Unbelievable that mainstream news and NASA of all organisations actually claimed as I was watching their youtube Ison hangout last night that it appeared that the comet had disintegrated when on Lasco images it clearly showed that it had not. Did Ison die to be resurrected in the next few days when we will clearly know by then how much of it has survived. Is ISON the Transformer of Mayan mythology?? Quetzacoatl?? In the Chilam Balam it states, 'the quetzal bird shall come, the green bird shall come'. Are you 'feeling' it????

 

[jupiterbeings]

The best info on Ison is here....http://brucegary.net/ISON/

 

[Anthony]

http://www.youtube.com/watch?v=gHL78TNRlu4

Show's how ISON interacts with the sun. Not sure
what he is talking about when he says that something is following ISON.

 

[Laura]

I just think that their minds are so convinced of the "dirty snowball" thing that the idea of a mere mile wide chunk of ice surviving millions of degrees of heat blinded them. Not understanding the electric nature of comets is a huge blindspot.

 

[Zadius Sky]

The latest:

_http://www.cnn.com/2013/11/29/us/ison-comet/

Comet ISON sweeps near sun, shows signs of life
By Amanda Barnett, CNN
updated 6:12 AM EST, Fri November 29, 2013

Hold the obituary. Experts now think Comet ISON -- or at least part of it -- survived its close encounter with the sun.

Karl Battams, a comet scientist for the Naval Research Laboratory, said it is believed some parts of ISON's nucleus survived perihelion.

"It now looks like some chunk of ISON's nucleus has indeed made it through the solar corona, and re-emerged," he said. "It's throwing off dust and (probably) gas, but we don't know how long it can sustain that."

However, he said, its fate is uncertain.

"Now it has emerged and started to brighten, we need to observe it for a few days to get a feel for its behavior," Battams said.

[...]

The discovery stunned many in the comet-watching community and led some to nickname ISON the zombie comet.

Others repeated an old joke about comets and cats.

"Comets are like cats; they have tails, and they do precisely what they want," David H. Levy said.

This comet also seems to have something else in common with cats -- nine lives.

I don't see anything about the comet's new trajectory, but interesting that some are calling it "the zombie comet."

 

[mkrnhr]

We will know what the "something that emerged" is after a few hours/days. When the comet approached the Sun, there was an extreme electric discharge at first, and then it went quiet when the comet was well in the corona. The absence of the comet in the ultraviolet images shows that there were no electric discharges. There are two possibilities: The nucleus was already at the same electrical potential of the surrounding plasma, or the nucleus was no more.
In the next days, if the something that emerged disperses and vanishes (like Elenin) then it's a debris field. It it brightens and maybe develops a tail/tails, then a nucleus or a bunch happy nuclei did survive and will be experiencing different potentials as they travel far from the Sun.
A third less likely scenario is that a some fragments (nuclei) did survive as dead comets (will not develop visible tails) and took a different route while what we see is just a different remanent. Guess the best is to wait and see.

 

[Approaching Infinity]

I'm not exactly sure what he means when he says it will become a permanent member of our solar system. He's also dedicated a radio show to ISON that he's already posted so maybe he'll explain there.

He means that it will be 'captured' into a stable orbit within the solar system and not simply get flung back into space.

 

[jupiterbeings]

Interaction with the suns corona here if this guys correct.
https://www.youtube.com/watch?v=v-9rgnhzXfA

 

[Nook]

Interaction with the suns corona here if this guys correct.
https://www.youtube.com/watch?v=v-9rgnhzXfA

Interesting video. Electric interaction with the sun would be my guess to explain the peculiar changes in the corona.

(pic from the article)
Funny they declared it gone when clearly not enough time has passed to make that call.