Quote:
Originally Posted by carl37
That's a very cool graphic Andrew - I like it!
That looks about right using the MPC/JPL ephemeris, but my link a few posts ago is to a blog post by Leonid Elenin in which he states he has made new calculations including a further 6 days of observation arc.
These have not been published at the MPC yet, which is where the JPL data comes from.
Carl
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Carl,
from JPL I get:
Code:
EC= 1.000076483324882E+00 QR= 1.399572296215722E+00 IN= 1.290158988346881E+02
OM= 3.009529751244577E+02 W = 2.438725831780988E+00 Tp= 2456956.205760196317
Using find_orb with all the observations in MPEC (last entries are in K13D50) I get mag 5.9 and:
Code:
EC= 1.0001012017 QR= 1.3995560557 IN= 129.01549809
OM= 300.95223725 W = 2.43718722 Tp= 2456956.189119
From 133 observations 2012 Dec. 8-2013 Feb. 20; RMS error 0.519 arcseconds.
Unfortunately find_orb won't generate an ephemeris with the necessary number of digits of precision to generate the graph. Trying those MPEC numbers in Starry Night it generates closest approach at 2014-10-19 23:21 UTC and 348526 km.