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:

ObjectConstellationRight ascension (J2000)Declination (J2000)Apparent magnitudeDiameter (′)
Terzan 1Scorpius17h 35m 47.8s−30° 28′ 11″13.92.4'
Terzan 2Scorpius17h 27m 33.4s−30° 48′ 08″14.290.7'
Terzan 3Scorpius16h 28m 40.1s−35° 21′ 13″12.04.0'
Terzan 4Scorpius17h 30m 38.9s−31° 35′ 44″16.00.7'
Terzan 5Sagittarius17h 48m 04.9s−24° 48′ 45″13.852.1'
Terzan 6Scorpius17h 50m 46.4s−31° 16′ 31″13.851.2'
Terzan 7Sagittarius19h 17m 43.7s−34° 39′ 27″12.06.0'
Terzan 8Sagittarius19h 41m 45s−34° 00′ 01″12.44.4'
Terzan 9Sagittarius18h 01m 38.8s−26° 50′ 23″16.01.5'
Terzan 10Sagittarius18h 02m 57.4s−26° 04′ 00″14.9b. d.
Terzan 11Sagittarius18h 12m 15.8s−22° 44′ 31″16.41.5'

See also