Another reason. Look at the image I posted of ISON as of 2:10 e.s.t. and then watch Lovejoy as it emerges. Lovejoy's tail goes in the opposite direction of the sun and nucleus. The image of ISON at 2:10pm EST shows a dust trail. http://www.youtube.com/watch?v=Tk6sSAqoLqM
It never fails to amaze me that a 1 or 2 kilometer diameter ice and rock ball can create a tail that's hundreds of thousands of kilometers long. patrick On 28 Nov 2013, at 15:27, Jay Eads wrote:
Another reason. Look at the image I posted of ISON as of 2:10 e.s.t. and then watch Lovejoy as it emerges. Lovejoy's tail goes in the opposite direction of the sun and nucleus. The image of ISON at 2:10pm EST shows a dust trail.
All hail zombie comet ISON! There's increasing evidence that it is undead, or maybe only mostly dead. The latest SOHO image definitely shows a notable object, though it's yet to be seen if it's just debris and dust, or still a comet. http://soho.esac.esa.int/data/realtime/c3/1024/latest.html Even if it is debris or if it continues to fall apart, couldn't this result in a spectacular tail over the coming days/weeks, even if there is no coma? Or is the thinking that it would be too dissipated by the time it becomes visible? Jared On Thu, Nov 28, 2013 at 3:33 PM, Wiggins Patrick <paw@getbeehive.net> wrote:
It never fails to amaze me that a 1 or 2 kilometer diameter ice and rock ball can create a tail that's hundreds of thousands of kilometers long.
patrick
On 28 Nov 2013, at 15:27, Jay Eads wrote:
Another reason. Look at the image I posted of ISON as of 2:10 e.s.t. and then watch Lovejoy as it emerges. Lovejoy's tail goes in the opposite direction of the sun and nucleus. The image of ISON at 2:10pm EST shows a dust trail.
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Unreplenished tails dissipate quickly, within hours or days. I remember comet McNaught. It had a huge, resonance-banded tail (visible only in the southern hemisphere in it's entirety) but all you could see in daytime from here was a bright coma. I think our only hope of seeing something is if a portion of the nucleus has survived perihelion, and it is at least somewhat active in retreat. Hopefully the clouds give us a break. On Thu, Nov 28, 2013 at 6:37 PM, Jared Smith <jared@smithplanet.com> wrote:
Even if it is debris or if it continues to fall apart, couldn't this result in a spectacular tail over the coming days/weeks, even if there is no coma? Or is the thinking that it would be too dissipated by the time it becomes visible?
Chuck: Actually prior to perihelion McNaught was easily visable in 10x50 binoculars from what is now the site of the natural history museum. I shared the view with my fiend Tho Dinh, his wife and an colleague. Tho also snapped this picture http://www.slas.us/gallery2/main.php?g2_itemId=374 He used a 4 inch refractor on an altaz mount with a Canon 350D. Low tech even for 5 years ago. He also brought along his television universal remote in order to snap the picture without touching and disturbing the rickety set up. It was a wintery chilly sunset that just happened to be cloud free. DT From: Chuck Hards <chuck.hards@gmail.com>
To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Thursday, November 28, 2013 8:44 PM Subject: Re: [Utah-astronomy] ISON (?) Lives
Unreplenished tails dissipate quickly, within hours or days. I remember comet McNaught. It had a huge, resonance-banded tail (visible only in the southern hemisphere in it's entirety) but all you could see in daytime from here was a bright coma. I think our only hope of seeing something is if a portion of the nucleus has survived perihelion, and it is at least somewhat active in retreat.
Hopefully the clouds give us a break.
On Thu, Nov 28, 2013 at 6:37 PM, Jared Smith <jared@smithplanet.com> wrote:
Even if it is debris or if it continues to fall apart, couldn't this result in a spectacular tail over the coming days/weeks, even if there is no coma? Or is the thinking that it would be too dissipated by the time it becomes visible?
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Actually I wrote "daytime" view, not dusk. Sun still up. Thanks. On Nov 28, 2013 10:15 PM, "daniel turner" <outwest112@yahoo.com> wrote:
Chuck:
Actually prior to perihelion McNaught was easily visable in 10x50 binoculars from what is now the site of the natural history museum. I shared the view with my fiend Tho Dinh, his wife and an colleague. Tho also snapped this picture
http://www.slas.us/gallery2/main.php?g2_itemId=374
He used a 4 inch refractor on an altaz mount with a Canon 350D. Low tech even for 5 years ago. He also brought along his television universal remote in order to snap the picture without touching and disturbing the rickety set up.
It was a wintery chilly sunset that just happened to be cloud free.
DT
From: Chuck Hards <chuck.hards@gmail.com>
To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Thursday, November 28, 2013 8:44 PM Subject: Re: [Utah-astronomy] ISON (?) Lives
Unreplenished tails dissipate quickly, within hours or days. I remember comet McNaught. It had a huge, resonance-banded tail (visible only in the southern hemisphere in it's entirety) but all you could see in daytime from here was a bright coma. I think our only hope of seeing something is if a portion of the nucleus has survived perihelion, and it is at least somewhat active in retreat.
Hopefully the clouds give us a break.
On Thu, Nov 28, 2013 at 6:37 PM, Jared Smith <jared@smithplanet.com> wrote:
Even if it is debris or if it continues to fall apart, couldn't this result in a spectacular tail over the coming days/weeks, even if there is no coma? Or is the thinking that it would be too dissipated by the time it becomes visible?
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participants (5)
-
Chuck Hards -
daniel turner -
Jared Smith -
Jay Eads -
Wiggins Patrick