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I was doing a project on Binary stars. I wanted data of masses, eccentricity, semi-major axis, and radial velocity. I tried many sites but I couldn't find them. Where can I download such data from?

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  • $\begingroup$ Try searching this site! $\endgroup$
    – uhoh
    May 19, 2020 at 6:14
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    $\begingroup$ Many Google hits on "catalogue of binary stars" $\endgroup$
    – ProfRob
    May 19, 2020 at 8:00
  • $\begingroup$ I'm curious if you could use a catalog like Hipparcos (or GAIA DR 2) to "manually" find binary stars. $\endgroup$
    – user21
    May 19, 2020 at 16:16

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If you are looking for professional data you can find them on VizieR. If you search for double star you will find 103 catalogues on double stars (some containing data only for a specific area in the sky). I haven't looked at all 103 catalogues, but the Orbits of 451 wide visual double stars : J/PAZh/45/35 looks promising. (If you want to download it, go to the FTP tab.)

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  • $\begingroup$ thank you very much very much. l have already tried VizieR, Simbad, USNO, and BDB. none of them provided masses of individual components i have to calculate it. in WDC, i could not download them. $\endgroup$
    – Jiswin
    May 20, 2020 at 5:55
  • $\begingroup$ That might be more difficult. In the catalogue I mentioned there is a mass in the table but it seems to be the combined mass. i.e. the last two columns (see cdsarc.unistra.fr/ftp/J/PAZh/45/35/ReadMe). $\endgroup$
    – Dieudonné
    May 20, 2020 at 16:35
  • $\begingroup$ thank you. at lat i got it... [vizier.u-strasbg.fr/viz-bin/VizieR-4] $\endgroup$
    – Jiswin
    May 26, 2020 at 5:21

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