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

The Double Star Database contains:

142211 records from the WDS catalog (Release 2018-01-18)
2725 records from the ORBIT6 catalog with 2278 matches (Release 2018-01-18)
23162 records matched to HIPPARCOS catalog
68198 records matched to Tycho-2
27942 records matched to SAO catalog
9110 records from the Bright Star Catalogue - Harvard Revised (HR) catalog
174 common star names
48 double star reports (43 distinct doubles)
376 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 2.3

[new] in Misc->Discoverer, a filter to speedup search of discoverer was implemented
[upg] graphical routines upgraded
[new] a new filter: physical. Other than WDS flags, I use rPM information here to
      estimate doubles phisically bound
[new] a legend for color codes was add in orbit graph
[new] in advanced search, a "not equal" option  was added in the popup list.
      Because in Database one can confuse the filters, when a "not equal" is selected
      the filter will became red
[fix] adding a text list to an existing one was broke
[fix] in some cases, a not-standard list was exported as standard in Excel
[new] export to Italian-language Excel (we use commas instead of dots as floating point
[upd] merge lists now defaults last modified lists
[new] custom list - column in lists are user-definible selecting "custom list" in

StelleDoppie version 2.2

[upd] all catalogs where updated to latest release
[new] all lists can now be saved appending its content to an existing one
[fix] a bug prevented to delete a checked list during lists merge
[mod] improved the import script to dealt with null measures
[new] it is now possibile to edit identifiers one by one during list import
[new] ReducDat.txt files can be imported as list target
[fix] text typed where not corretly recognized during list import
[mod] a better search algorithm gives more chances to recognize doubles during import
[new] in Setup->Preferences, you can choose to show lists in NORMAL, WDS, FULL and COMPACT mode.
In COMPACT mode, discov_num+comp are in one single field separated by one space, 
as in CDSA2.
[mod] hits in Populars view are not more shown
[fix] on iOS devices, numbers are no more recognized as telephone numbers to call

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Version: 2.3.1

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