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Messier 55 (also known as M55, NGC 6809, or Specter Cluster) is a globular cluster in the south of the constellation Sagittarius. It was discovered by Nicolas Louis de Lacaille in 1752 [ a ] while observing from what today is South Africa . [ 8 ]
Open cluster: Messier 69: 90 [20] Globular cluster: Messier 9: 90 [21] Messier 56: 84 [22] Messier 10: 83.2 [23] NGC 3201: 80 [24] Messier 107: 79 [25] Messier 46: 75.6 [26] Open cluster: Messier 4: 75 [27] Globular cluster: Nearest globular cluster to the Earth. Also the first globular cluster known to have exoplanets (PSR B1620-26b) Messier ...
The Sagittarius A* cluster is the cluster of stars in close orbit around Sagittarius A*, the supermassive black hole at the center of the Milky Way (in the Galactic Center). The individual stars are often listed as " S-stars ", but their names and IDs are not formalized, and stars can have different numbers in different catalogues .
NGC 6569 is a globular cluster in the constellation Sagittarius. It has an apparent magnitude of about 9.5, [1] and an apparent diameter of 7 arc minutes, and class VIII with stars of magnitude 15 and dimmer. [2] It is about 2 degrees south east of Gamma 2 Sagittarii.
The Shapley–Sawyer Concentration Class is a classification system on a scale of one to twelve using Roman numerals for globular clusters according to their concentration. . The most highly concentrated clusters such as M75 are classified as Class I, with successively diminishing concentrations ranging to Class XII, such as Palomar
HD 189831 Observation data Epoch J2000 Equinox J2000 ; Constellation: Sagittarius: Right ascension: 20 h 03 m 33.45912 s [1]: Declination: −37° 56′ 26.5236″ [1] Apparent magnitude (V)
Quintuplet cluster region, with V4650 Sgr to the left of the Pistol Nebula (annotated in full-size image) V4650 Sgr was first catalogued in 1996 as star 362 in a list of stars in the galactic centre region near the Quintuplet Cluster. [4] The acronym qF is used for stars in the list and so the star name is qF 362.
Parallax measurements give an estimated distance of 55.8 light years from the Sun. [1] It is drifting further away with a heliocentric radial velocity of +15.4 km/s. [ 2 ] This star is a pre-main-sequence [ 11 ] solar analog [ 12 ] with a stellar classification of G1 V. [ 2 ] It is spinning with a projected rotational velocity of 7.53 km/s [ 8 ...