This cluster is about 28,700[3]light-years away fromEarth and 5,200 ly from theGalactic Center,[12] with a spatial radius of 45 light-years.[6] It is a relativelymetal-rich globular cluster that is a likely member of thegalactic bulge population.[13] It has a mass of200000M☉ with a half-mass radius of 11.6 ly,[5] a core radius of 29.2 ly, and atidal radius of 91.9 ly.[3] Its center has a bright luminosity density of6,460 L☉·pc−3 (meaning per cubic parsec).[12] It is a close neighbor of its analogM70 – possibly only 1,800 light-years separates the two.[14]
^Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters",Harvard College Observatory Bulletin,849 (849):11–14,Bibcode:1927BHarO.849...11S.
^"Messier 69".SEDS Messier Catalog. RetrievedApril 30, 2022.
^abMandushev, G.; et al. (December 1991), "Dynamical masses for galactic globular clusters",Astronomy and Astrophysics,252: 94,Bibcode:1991A&A...252...94M.
^Heasley, J. N.; et al. (August 2000), "Hubble Space Telescope Photometry of the Metal-rich Globular Clusters NGC 6624 and NGC 6637",The Astronomical Journal,120 (2):879–893,Bibcode:2000AJ....120..879H,doi:10.1086/301461.
^Frommert, Hartmut; Kronberg, Christine (July 20, 2011),"Globular Cluster M69",SEDS Messier pages, Students for the Exploration and Development of Space (SEDS), retrievedDecember 3, 2018.
^"Cosmic riches".ESA/Hubble Picture of the Week. RetrievedOctober 3, 2012.
^In daily rising of this globular cluster, whether in day- or nighttime, it will reach 15° above the due southern horizon, at the 90°−32°−15° parallel thus the43rd parallel north, the furthest north for very detailed, easy observation for this object
![As globular clusters go, M69 is one of the most metal-rich on record.[15]](/mt/?noimg=&dark=on&url=https%3a%2f%2fen.wikipedia.org%2fwiki%2fFile%3aMessier_69_Hubble_WikiSky.jpg)
