Ronn!Blankenship wrote: > > I'm not sure about _accelerations_, > That's the problem, isn't it? But maybe if we don't expect any two stars to get close enough, they will just follow some 200 or so million year orbit around the Galaxy, which will reduce to an almost straight line in anything of the order of 10 million years.
> but the Hipparcos/Tycho catalog has the > best currently available information on the motions of > the stars it lists > Ok > There was an article in _Sky and > Telescope_ within the past few years in which that data was used to > determine which star was the apparently brightest star as seen from Earth > at any given time during the interval 5 mybp to 5 myap. > m = 1/1000. Do you mean My or ky? (Frex, Alberio >will be the brightest star in the sky about 4.5 my from now.) > Does this sound like what you need? > Yep - ** if ** they explicitly give an error > If so, are you familiar with the Hip/Tyc catalog > and its data format, or do you need more information? > No; but I guess I can find it quickly with a google search. It's free, isn't it? Probably some Megabytes of data I've been using the Gliese3 catalog for some time Alberto Monteiro _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
