VdBH 25a A, for which case-sensitivity may be necessary for solving format ambiguities. The full list is available on-line . Identifiers of a multiple system may generate a list of the objects of the system. For instance, ADS 5423 calls for the four components, A to D, of the stellar system around Sirius. This is true only for some specific identifiers.
More details are available in the on-line description .
The user interface provides an option for querying around objects, with a radius set by default at 10 . This is equivalent to a query by position using the object coordinates. It is also possible to generate the list of 10 or 25 next objects following a given identifier, or to submit a list of object names, stored in a file with one identifier per line. 4.4 Query by coordinates Query by coordinates can be used to retrieve all objects in a circular field defined by the coordinates of the center and a radius. The WWW interface provides an interactive form which presents all possible sampling options.