Please note: this site is experimental, data may be cancelled anytime, nothing is due. Read the disclaimer for more information.

Stelle Doppie contains:

154540 records from the WDS catalog (Release 2021-12-25)
3419 records from the ORBIT6 catalog with 2954 matches (Release 2021-12-17)
32174 records matched to HIPPARCOS catalog
100218 records matched to Tycho-2
54515 records matched to SAO catalog
139155 records matched to Gaia DR2
9110 records from the Bright Star Catalogue - Harvard Revised (HR) catalog
194 common star names
206 double star reports (188 distinct doubles)
379 measured

If you're a newcomer, you could ask yourself: and now what I have to do?
Ok, don't panic. First, click on the Database tab and look at the left vertical bar: I prepared ready-to-use double star selections for you. Just click on the names, for example the most populars doubles list or the three stars systems list
Next, I suggest to register yourself choosing a username and password: once you're logged in, use the Setup tab to setup your site's preferences.
Remember to input your telescope's diameter (aperture): by means of the Dawes formula I can calculate the minimum separation between two stars permitted by your instrument, so you can filter out doubles too close to be seen.
Have fun!


This site is maintained during my spare time.
If you find it useful and you want to contribute, you can make a welcomed donation.

StelleDoppie version 2.8

[upd] increased the text font size to help readability
[new] description labels in input forms to improve user experience
[mod] HTML div instead of table, will help compatibility in browsers
[fix] Misc menu asked for a login, but was not necessary
[new] interactive Aladin images now displays all components name instead of primary only
[upd] searching a text now disables all filters to avoid empty results
[fix] JD math in saving a measure was incorrect
[fix] greek letter eta was $e instead of $h. Thank you Bill Tschumy
[upd] improved Bayer and Flamsteed searches
      can recognize $a, constellation code, genitives and names
[mod] another step toward security, deleting obsolete libraries
[fix] login link in the upper corner was disappeared
[mod] visual limit filter uses another formula
[fix] aligned on the same baseling normal text and bold
[upd] during printing left column in not displayed
[fix] introduced again New measure and New report 
[new] export lists in votable (!!!)
[new] My preferred lists filter in Workbench->Other Users' Lists
[new] Suggested lists filter in Workbench->Other Users' Lists
[new] introduced a limit of 20 shared lists to avoid spam
[upd] a new link points to the alternative site for data request form
[fix] bug fix ordering for wds_name
[fix] bug in some other_name due to orbit6 errata designation (ie: A 1874AB --> STFA 32AC)
[new] messages to invite people to register the site and login
[fix] Gaia DR2 number was displayed truncated (thank you Steve Stonebraker)
[fix] the number of items to display in Workbench lists was not according preferences 
[upd] Help text is normal style not all bold
[upd] other Arrakis (Mu Draconis) designations
[upd] improved SkySafari export routine, will match more doubles. Thank you Bill Tschumy

StelleDoppie version 2.7

[new] a new tab Components was added, to show single star component
      data, infos and catalogs.
[new] double entry table with distances and position angles
      between components
[upd] Cartes du Ciel catalogs DSD, DSDv, DSDm
[fix] some virtual eyepiece could not be calculated because a
      component was missing
[fix] infrared band warning

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Version: 2.8.1

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