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New trajectory for ISON. NASA updated yesterday...! (Update for Oct. 15th)
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[quote:Reality420 47610773:MV8yMzg0MDU2XzQwODAzOTc2XzcwNzNGMDI3] [quote:Rogue Lemming:MV8yMzg0MDU2XzQ5QUZDRTIz] # obs. used (total) 5131 data-arc span 745 days (2.04 yr) first obs. used 2011-09-30 last obs. used 2013-10-14 planetary ephem. DE431 SB-pert. ephem. SB431-BIG16 fit RMS .65678 data source ORB producer Otto Matic solution date 2013-Oct-14 17:14:05 [b][color=green]It will actually be further from earth when it flys by now[/color][/b] [youtube]http://www.youtube.com/watch?v=qjNvv4de9x8[/youtube] [/quote] - "significant albeit slight changes" - "no longer have a nearly perfect pass over the north pole of earth just before new years" - "The comet is still going to cross over our trajectory at that time." - "The comet is expected to leave closer to its general incoming direction, however" This guy is very confused. - The changes [b]are insignificant[/b]. - The comet never had "a nearly perfect pass over the north pole of earth". Where, and how, did this moran come up with that? (mis)Using the JPL orbit java toy I'll bet. When it crosses earth's orbit in late December it will be ahead of earth, [b]for both the old and new orbits which differ by less than 12000 miles at that time[/b]. - Using my Samuel L. Jackson impression and being pedantic: "English mofo! Do you speak it? It's called an "orbit", not a "trajectory". Trajectory is conventionally used for parabolic and hyperbolic motions... on earth." - It is not. Where, and how, did this moran come up with that? (mis)Using the JPL orbit java toy I'll bet. The changes to the obit are so slight you can't see them even in January without a good telescope and astrometry: old: 2013-Dec-31 00:00 -- 16 35 15.28, +67 18 00.0 1.101761368954, 0.44239565649452 Date________________R.A.________Dec_______sun distance____earth distance new: 2013-Dec-31 00:00 16 35 14.63, +67 18 04.0 1.101779980082, 0.44241432216320 For the maths challenged that is a separation of 0.0015 degrees. 1.5 thousandths of a degree. The old position is ~12000 miles from the new position in January. Virtually nothing except to astronomers. Well, at least he isn't cying "DOOM!!!!!!", but I don't listen to him so ... If this guy is who you all think is 'great', you may want to reconsider. In this vid he is certainly better than MrCartoonwatcher (aka BPEarthwatch), but he doesn't know his ass from a hole in the ground about science, and he'd be lost without the JPL orbit toy. Be careful with what he says since he seems to get most of it wrong. Should he start crying "DOOM!!!!", remember that he doesn't know what he's talking about and 12 year olds can make RubeTube vids pretending to have knowledge of that which they are ignorant. R. kOOks lie. Constantly. It's part of the job description. [/quote]
Original Message
Yesterdays Info:
# obs. used (total) 5131
data-arc span 745 days (2.04 yr)
first obs. used 2011-09-30
last obs. used 2013-10-14
planetary ephem. DE431
SB-pert. ephem. SB431-BIG16
fit RMS .65678
data source ORB
producer Otto Matic
solution date 2013-Oct-14 17:14:05
Today's info:
Orbit Determination Parameters
# obs. used (total) 5152
data-arc span 746 days (2.04 yr)
first obs. used 2011-09-30
last obs. used 2013-10-15
planetary ephem. DE431
SB-pert. ephem. SB431-BIG16
fit RMS .6617
data source ORB
producer Otto Matic
solution date 2013-Oct-15 11:12:07
It will actually be further from earth when it flys by now
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