Washington Catalog of Double Stars (WDS, a core TheSky6 Database)

The WDS is a catalog of over 99,000 double stars and multiple star systems. The WDS contains information about the angular separation and position angle of each star in the star system. TheSky6 displays this information as a series of lines that are drawn from the central star to the other stars in the double or multiple star system.

Note that the WDS contains information on double and multiple star systems, but does not cross reference this information to stars in other standard stellar catalogs. Therefore, there will be instances where TheSky6 shows a multiple star system, with no associated "star symbols" for each star in the multiple star system.

Double star example where both stars are in included as part of TheSky6's core stellar databases.

In this example, notice that no stars appear at many line endpoints. This means that either there are no corresponding stars from TheSky6's core stellar databases for this multiple star system, or the positions of the multiple star system are not sufficiently accurate.

This behavior is normal, and is a limitation of the data in the WDS catalog.