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Astro Blog
Stay Updated

The Big Question - Is Comet ISON Disintegrating and Fading Up Now ?  

12/2/2013

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Picture
Picture
Here we present you the latest SOHO image of Sun and ISON. 
Clearly visible, ISON, at the upper portion of the image is featuring as a foggy patch only. It has failed to appear with its bright core portion. It looks like ISON is disintegrating now. And it's brightness is decreasing rapidly. We will wait for the scientists to build up their opinions.
But so far our own understanding goes-- we would prefer editing the headline of this post.----
" Here we present you the latest SOHO image of Sun and ISON ... WHAT IT WAS ONCE 'ISON.' "
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" ISON Roller Coaster Ride "

12/1/2013

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PictureComet C/2012 S1 ISON in the Cor-2 images on the NASA STEREO Behind spacecraft.
Friends, we are receiving  many questions asking us on why  this blog is not featuring our updates on ‘Current’ status of ISON?

You are correct.
After following the NASA’s discussion LIVE during the perihelion,  we made many updates on our Facebook Page and Our Discussion thread (http://www.skywatchersindia.com/comet-ison.html).
But, this blog is silent on ISON’s current update  as we have preferred to keep it like this. We refrained from making our opinion on this. With our understanding from the opinions made by experts, what we can say right now is ‘NOT CLEAR.’ Yes there is nothing ‘Black’ or ‘White’  yet from any of the cometary scientist or space geologist. Everything is still in shades of Grey.
But for sure
   * ISON has lost almost entire volume of its volatile                 materials.
   * ISON is not going to be an excellent show maker in the       days to come.
 Most importantly,
   * ISON has already taught many things, and will give many more new information to our scientists in future when they go with deeper and deeper in analyzing the stills and video footages along with other recorded database of the phase of ISON’s Solar encounter.

We will definitely keep on posting updates in this blog with concrete info as those start coming out.  Follow us for them in "ISON Roller Coaster Ride"
I conclude here, we will prefer quoting  Karl Battams of global conglomeration CIOC as,  "During its passage through the Sun's million-degree corona, its dusty/gassy coma got very much burnt away, though clearly some fine dust survived (which is the fine cloudy stuff you see being pushed away from the Sun). Or something did emerge from the corona. It could be a comet, or just the remains of what once was. We can't tell right now."
However, for all of those who are asking " How to see Comet ISON in its second innings?’ " the short answer is – even if we consider ISON as an winner of its battle with SUN, it will not be possible to have a glimpse of it before 5th/6th December. Look East before twilight, ISON will be there.
Wishing you all a clear sky and successful viewing of ISON. Share your experience with us. 
Currently leaving you with a .gif image from NASA STEREO Behind spacecraft.[Image credit: NRL/NASA]
 ( Image size is 7mb so wait for few moment to load the image or click on the image to view the animated .gif image ) 


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November 28th, 2013

11/28/2013

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Picture
Latest image of ISON. Taken at 06:24AM (IST). It shows distinct dust tail as well as Ion tail. The comet has gone much brighter. Scientists are keeping fingers crossed. We are waiting for their opinions and observation interpretations.
So we can say that ISON is performing well at the time when the picture was taken. And may be the nucleolus is not fragmented till now. 

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Still confusion over Comet ISON's nucleus has disrupted or not.

11/27/2013

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Picture
It has become too dynamic. Changing every hour. New info- new image- new knowledge base are coming every moment. Attached image is taken with a space born telescope. See what Jakub Cerny of CIOC (A global conglomeration of experts to study ISON) says on this: The long thin tail visible originaly on STEREO-A images is now also visible in SOHo C3 images. From SOHo images it is clearly visible that this is not the ion-tail and it is more likely synchronic feature. Synchronic features are originated in very shortime extensive emission of various sized dust grains. Such feature was observed after disruption of comet Lovejoy. So it really seems something disintegrated in here if it was fragment or entire nucleus is part of questions.

Actually the nucleus disruption seems to be still the best option.
1. As my calculations yesterday pointed if there would be anything active in coma it would correspond to one spherical nucleus with diameter 630 - 100 meters. If there will be more subfragments (as seen in C/1999 S4 (LINEAR) case) such active surface can be easily reach by larger number of 20-50 meter sized fragments.
2. Comet brighten nearly as simple reflecting body, actualy if some post-disruption larger subfragments keep to disintegrating, amount of dust in coma will grow and brightnes can slightly grows.
3. Ion tail is still not present, there is small or no outgassing in coma.
4. Spine tail a synchronic feature observed in case of disintegrated comets is present, and even it looks that brightness is enhanced towards this tail, which indicate that majority of dust comming from this event.

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ISON NEWS FLASH ECCENTRICITY CHANGED :

11/27/2013

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ISON NEWS FLASH: 07:00 UT. 26th Nov. As the latest Jet Propulsion Laboratory info says- ISON is not leaving us forever. It will come back again. After 581480.34 years. Now its orbit is being considered as a long long ellipse with its eccentricity as .9999982136165803.But yes, scientists are still not sure on this. calculations are going on.
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Comet ISON Non Stacked Single Frame Image

11/20/2013

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Picture
ISON as on 17th Nov 04:59AM IST From Jalpaiguri India
Picture
ISON as on 17th Nov 04:59AM IST From Jalpaiguri India
Happy to present you the pictorial record of SWAN's first glimpse of Comet ISON. Taken on 17th Nov 04:59AM IST. Had a plan to shoot it from Jalpaiguri through guided mount and Telescope. But, sudden cloud formation in east horizon from 3:00AM forced us to take hasty decision to leave all equipment and move only with camera and lens. A risky journey of 30km, a chase for clear sky, it was. But finally came out to be rewarding. May not be of very high class, but we loved this image, our first view of Comet ISON. 
This is a non stacked single frame image of comet ISON.
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REAL IMAGE OF Comet C/2012 S1 (ISON).

10/17/2013

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Picture
A colour image of ISON taken by our good friend Efrain Morales. It was taken on On October 11th, 08:47-59ut.

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Comet C/2012 S1 (ISON) Curve of Light updated with the correction for Phase Effect.

10/17/2013

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Picture
Comet C/2012 S1 (ISON) Curve of Light updated with the correction for Phase Effect. The data are CCD in R band!

Credit for this curve goes to our good friend Toni Scarmato who has contributed this for SWAN's ISON site.

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REAL IMAGE OF Comet ISON C/2012 S1.

10/6/2013

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Picture
Picture taken:  October 4th, 09:00-09:24 UT. (14:30:09 IST)
Exposure:        (6x4min. Exp.)     
Image credit:   Efrain Morales. 


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