The standardized designations (also called principal name)
adopted in HyperLeda are chosen by descending the hierarchy:
NGC or IC
ESO or UGC
PGC (and LEDA extension)
HD, BD (stars)
Original designation
The basic rule for adopting a syntax is that the designation should be understood
by other databases: NED and SIMBAD.
We recommend to avoid the use of space characters within the designations
(eg. between the catalogue name and the number). Blanks are generally
used as field separator, and designations are considered as one field.
Clicking on Designation links to the Search by Name page.