Messier 54 (also known as M54 or NGC 6715) is a globular cluster in the constellation Sagittarius. [a] It was discovered by Charles Messier in 1778 and then included in his catalog of comet-like objects. It is easily found in the sky, being close to the star ζ Sagittarii.

2017年8月14日 · "As part of the ACS Survey of Galactic Globular Clusters, we present new Hubble Space Telescope photometry of the massive globular cluster M54 (NGC 6715) and the superposed core of the tidally ...

Messier 54 (NGC 6715) is a globular cluster located in the constellation Sagittarius, in the Galactic Center of the Milky Way Galaxy in the Local Group of galaxies. M54 is 87400 light years away from Earth.

Messier 54 (or M54 or NGC 6715) is a globular cluster in the constellation Sagittarius. It was discovered by Charles Messier in 1778. Later, he included it in his catalog of comet-like objects. M54 was thought to belong to our Milky Way galaxy, but in 1994 it was discovered that M54 belongs to the Sagittarius dwarf elliptical galaxy ('Sag DEG ...

2015年6月10日 · Messier 54 (M54) is an extragalactic globular cluster located in the southern constellation Sagittarius. It has an apparent magnitude of 8.37 and lies at a distance of 87,400 light years from Earth. It has the designation NGC 6715 in the New General Catalogue.

2007年7月31日 · We present new Hubble Space Telescope photometry of the massive globular cluster M54 (NGC 6715) and the superposed core of the tidally disrupted Sagittarius (Sgr) dSph galaxy as part of the ACS Survey of Galactic Globular Clusters.

2022年10月19日 · NGC 6715 (also known as Messier 54 or M54) is a GC hosting about 1 million stars. It is one of the most compact globular cluster known and is located at the constellation Sagittarius. It has been proposed that NGC 6715 has an intermediate mass black hole of ∼9400 M ⊙ in its center (Ibata et al. 2009). At the radio band, there is no pulsar ...

NGC 6715 and NGC 6723 are detected. Especially NGC 6715 is located at a distance of 26.8 kpc, so far it is the farthest globular cluster detected in gamma-rays. A detailed analysis for these three globular clusters has been performed, but their gamma-ray pulsation emissions or ux variabilities are not found. The numbers of millisecond.

Messier 54 or M54 (also designated NGC 6715) is a globular cluster in the constellation Sagittarius. It has an apparent visual magnitude of 7.6 and its angular diameter is 9.1 arc-minutes. M54 lies at an estimated distance of 88,700 light years.

Name(s): Messier 54. M54. NGC 6715. Type: Globular Cluster. RA: 18h 55m 03s. Dec: -30º 28’ 47” Constellation: Sagittarius. Size (arcmin): 12 arcmin. Magnitude: +8.4. Distance: 87,400 ly. Image. Date: 2020-09-18 to 2020-10-13. Location: iTelescope.net, SSO near Coonabarabran, NSW Australia. Size (arcmin): 40×26 arcmin. Telescope: 20” f/4 ...