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I've run into an incredible range of distances from us given for this
star...and a good summary of many of them at http://wnt.cc.utexas.edu/~ecannon/ What is the best source for how far Betelgeuse is from us...and how big it really is? Rick. |
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In article , Rick
wrote: What is the best source for how far Betelgeuse is from us...and how big it really is? SIMBAD is the typical starting point for this sort of query: http://simbad.u-strasbg.fr/sim-fid.pl Enter "Betelgeuse" into the `identifier' box and let it grind. You'll get data including this: Radial velocity (v:Km/s) or Redshift (z) v +21.0 [ .9] A 1953GCRV..C......0W Parallaxes (mas) 7.63 [1.64] A 1997A&A...323L..49P The reference is to the Hipparcos catalogue. A parallax of 0.0076 arc seconds implies a distance of 3.26 (ly/parsec)/0.0076 ly =~ 429 ly If you've got an angular diameter from interferometry, then you can calculate the absolute diameter from the range (above) and the angular diameter. -- Aidan Karley, Aberdeen, Scotland, Location: 57°10'11" N, 02°08'43" W (sub-tropical Aberdeen), 0.021233 |
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