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http://www.skyandtelescope.com/obser.../10775326.html Quote:
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IF I´m wrong you MAY be right Die Lücke, die wir hinterlassen, ersetzt uns vollkommen (Carl Heinz Schroth) |
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The weather is staying good, so I'm still at it. (0.4m Ritchey-Chretien reflector at the University of Alabama observatory, SBIG STL-6303E camera, R filter, exposures 10-300 seconds lengthening as the main dust puff expands). Here's a series from Oct 26-30 local time. I suspect that the symmetry of the main circular outburst is breaking with the outline fuzzing out on one side. Each image section is about 15 arcminutes N-S (out of the 20x30-arcminute field of the chip). These are quick-and-dirty logarithmic displays, with only dark subtraction done beforehand (mostly because my schedule has been hectic this week, but at least the bits are on disk for more complete exploitation later). |
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The weather is staying good, so I'm still at it. (0.4m Ritchey-Chretien reflector at the University of Alabama observatory, SBIG STL-6303E camera, R filter, exposures 10-300 seconds lengthening as the main dust puff expands). Here's a series from Oct 26-30 local time (between 0200-0400 UT each date, which will be one later than local). I suspect that the symmetry of the main circular outburst is breaking with the outline fuzzing out on one side. Each image section is about 15 arcminutes N-S (out of the 20x30-arcminute field of the chip). These are quick-and-dirty logarithmic displays, with only dark subtraction done beforehand (mostly because my schedule has been hectic this week, but at least the bits are on disk). (Edit: oops, I tried to add the timing information and ended up with a new post. Apologies.) Last edited by ngc3314 : 31-October-2007 at 02:32 AM. Reason: Adding timing information and messed up first edit... |
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I am amazed at the continued brightness. As the original cone of ejecta, (which we are seeing from 'behind'),expands and becomes more diffuse one might expect a brief bright burst then gradual dimming but the shell like structure of the ejecta cloud seems to indicate further disturbances at the core. Thanks for the wonderful series.
Kind regards Matt |
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I got a look at it through my old C-8 tonight, despite all the porch lights for Halloween, it was clearly naked eye visible, and very impressive through the scope. Some of the later trick or treaters got a bonus through the eyepiece.
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Good, don't stop. These are simply marvelous!
[Added: We'll make sure someone gets food to you. ]Here is the JPL orbital plot and data which shows much. Using their 3d view, it appears the Earth is in a position that would minimize the apparent positions of both the inward and outward "puffs". [Earth's orbital direction is reducing our view of it, but we are in a position to see it, of course.]
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Lighten up! This is a stellar board! Author: duh. "The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly. Last edited by George : 01-November-2007 at 06:06 PM. |
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Yeah keep them comming. Its been cloudy here for the past three days and your photos are keeping me abreast of the situation
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Beer, the cause of and solution to, all lifes problems |
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Lighten up! This is a stellar board! Author: duh. "The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly. |
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Can't fit them on one row any more, now spanning the nights of Oct. 26 - Nov. 1. Who'd have expected a full week of clear weather around here?
Tonight's imaging will be interesting - the athletic department asserts ownership of all nearby parking starting at 1700 the night before any home football game. Early in the night, though, we have a public event scheduled about 20 miles distant at a darkish site, which should acquaint many people with this eerie sight. The Birmingham newspaper ran the first four images on their front page today, which should be good for an extra crowd. Sorry about the default orientation (south up, east left). That will get fixed along with flat fielding and stacking One of These Days. Or nights. |
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The article is great, too! Very nice. Was the comet a good or bad omen for your son's football game? ![]()
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Lighten up! This is a stellar board! Author: duh. "The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly. |