The Terzan Catalogue (abbreviation: Ter) is an astronomical catalogue of globular clusters.
Overview The Terzan Catalogue consists of 11 globular clusters discovered by Agop Terzan using infrared observations made at Lyon Observatory in France during the 1960s and early 1970s. Most of the globular clusters are located in the constellations of Sagittarius and Scorpius, near the Milky Way's Galactic Center; Terzan 7 and Terzan 8 are most likely part of the Sagittarius Dwarf Elliptical Galaxy. Although all of the Terzan Catalogue objects were originally presumed to be globular clusters, there have been recent suggestions (by Mikkel Steine and others) that some of them may in fact be open clusters.
Since the original Terzan 11 is a duplicate of Terzan 5, more recent versions of the catalogue have renamed the original Terzan 12 as Terzan 11.
The catalogue is based on scientific papers published by Agop Terzan in 1966 (for Terzan 1), 1967 (for Terzan 2), 1968 (for Terzan 3 to 8), and 1971 (for Terzan 9 to 12).
List of clusters List of star clusters in the Terzan Catalogue:
Object Constellation Right ascension(J2000) Declination(J2000) Apparent magnitude Diameter() Terzan 1 Scorpius 13.9 2.4' Terzan 2 Scorpius 14.29 0.7' Terzan 3 Scorpius 12.0 4.0' Terzan 4 Scorpius 16.0 0.7' Terzan 5 Sagittarius 13.85 2.1' Terzan 6 Scorpius 13.85 1.2' Terzan 7 Sagittarius 12.0 6.0' Terzan 8 Sagittarius 12.4 4.4' Terzan 9 Sagittarius 16.0 1.5' Terzan 10 Sagittarius 14.9 b. d. Terzan 11 Sagittarius 16.4 1.5'
See also List of astronomical catalogues List of globular clusters
References