ID/Position

In extra-solar observational-based science cases like this, position is usually used as the basic identification for objects and cone searches are used to look for counterparts for the object. However some DataSets contain standard catalogue ID numbers (or even names) of objects e.g. Gleise 229b and the SIMBAD name resolver can be used to turn these into positions. Direct matching on ID is probably faster where this is possible and avoids ambiguities e.g. due to proper motions.

-- AnitaRichards - 23 Apr 2003