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REPORT ABUSIVE REPLY
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Message Subject
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ISON Webcast Update Thread! *Going to pick up the pace if government shutdown occurs*
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Poster Handle
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Dr. Astro |
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Post Content
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Well it's currently still raining here, so it doesn't look promising for tomorrow morning. I may have to wait until Friday morning, but if so, so be it. In case it does clear up, here is the ephemeris for ISON from my observing site on the 19th. I'll be talking about this some more during the webcast to show that ISON's orbit has not changed as is being claimed on youtube and elsewhere lately. [ link to dropcanvas.com] ISON's orbit and the resulting ephemeris were calculated using the astrometric data excluding any observations from the month of September. So if the orbit has recently "changed" as claimed, these coordinates shouldn't work. You know, if this is going to be your continuing ISON tracking thread, you may want to consider: To preclude the above sort of thing, you could post a daily ephemeris from say 01Oct 2013 through 31Dec 2013 generated either by JPL or MPC so when the claim is made again (and you know it will be made again ... Elenin!!!!) you can point to the date stamped post and ephemeris. You could edit your OP with an addendum so it is up front - first thing. Generating the ephem. when the claim is made and comparing it to the one in the OP generated in Sept. will exhibit only minor arcsecond changes as the orbit is continuously refined. Those dates include most of what the woo²s would consider "ominous" dates: Mars close approach, Earth close approach both ways, crossing Earth's orbit inbound and outbound, crossing the ecliptic (north to south... "OMG!!!! It's the Chartreuse CatChina!!!!"), perihelion, etc. Just a thought... Have fun. R. Not a bad idea. One problem though is that the claim's already been made so if I generate it from JPL or MPC now they could just say, "well the new orbit accounts for the change." That's why I'm generating it myself from FindOrb while excluding any recent data, but the results do agree with JPL to within a couple arcseconds which is all that really matters. I do like the idea of a daily ephemeris though. I think I'll generate one that runs for that time period on the half hour. That should give me enough points to make my point at any time in the future. 
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