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YU55 Closest Approach Distance Will Be 0.0000416667AU = 3904 miles -> NASA Lying<--
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[quote:Anonymous Coward 1488672:MV8xNjk1NzE2XzI4MDI4NjE1XzlFRjlGODRE] it's not NASA that generates the orbital elements of YU55 that is represented in their orbital diagrams, it's the entire astronomical community, amateur and professional represented through the Minor Planet Ephemeris Service. [/quote]
Original Message
From another site:
I am an engineer and my job involves various approaches to manipulating and analyzing data. I have this macro tool i use to interpolate and extrapolate data. So I took the distances of YU55 between Nov 4 - 11 (according to JPL, the close approach data is Nov 9 at 0.0022AU). Therefore, i get the following dataset:
Date Ref App Dist.
4 -5 0.0391
5 -4 0.0312
6 -3 0.0234
7 -2 0.0156
8 -1 0.0079
9 0 0.0022
10 1 0.0085
11 2 0.0162
Then I interpolate a per hour basis. So it looks something like:
Date Ref App Dist.
4 -5 -0.0391
-4.958333333 -0.038770833
-4.916666667 -0.038441667
-4.875 -0.0381125
... ... ...
Now think about this for a second... First of all, over a 7 day period, the trajectories of these two bodies are going to be relatively linear (straight). Therefore, the relative distance between the two will be linear as well (no corealis or angular acceleration or anything like that). Therefore, I should not see any significant disturbances in the data.
Secondly, the day to day distance given by jpl is taken at a 24 hr interval. Everything in between, they interpolate (supposedly just like I did). I compared their hour by hour distance to my interpolated data. All was spot on Until I got to the 8th (day before/of close approach). I observed that their distance decayed much more slowly than mine. So I created the following data. Notice, i applied the use of negative and positive distance to account for distance before and after close approach:
4 -5 -0.0391
5 -4 -0.0312
6 -3 -0.0234
7 -2 -0.0156
8 -1 -0.0079
9 0 0.0022
10 1 0.0085
11 2 0.0162
And came up with this during the course of Nov 8th:
8 -1 -0.0079
-0.958333333 -0.007479167
-0.916666667 -0.007058333
-0.875 -0.0066375
-0.833333333 -0.006216667
-0.791666667 -0.005795833
-0.75 -0.005375
-0.708333333 -0.004954167
-0.666666667 -0.004533333
-0.625 -0.0041125
-0.583333333 -0.003691667
-0.541666667 -0.003270833
-0.5 -0.00285
-0.458333333 -0.002429167
-0.416666667 -0.002008333
-0.375 -0.0015875
-0.333333333 -0.001166667
-0.291666667 -0.000745833
-0.25 -0.000325
-0.208333333 9.58333E-05
-0.166666667 0.000516667
-0.125 0.0009375
-0.083333333 0.001358333
-0.041666667 0.001779167
9 0 0.0022
finish it here [
link to www.myweathertech.com
]
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