SIMBAD recognizes standard astronomical nomenclature for stellar and non-stellar objects outside the Solar system. A summary
of all the catalogs in the SIMBAD database may be retrieved in LaTex format
from the SIMBAD
NED recognizes standard astronomical nomenclature for extragalactic objects.
Although its domain is a subset of SIMBAD's, NED offers two advantages
for referencing extragalactic sources: its
coordinate resolver is not as particular about the formats of
requests and its response time is faster, especially for U. S. users.
SIMBAD coordinate queries can require 30 seconds or longer to complete;
please be patient.