James Dunlop discovered NGC 1831 = D 246 = h2759 on 3 Aug 1826 and described a "pretty well-defined round faint nebula, 25" diameter; a little brighter at the centre." He observed it twice and his position is 5' W of center. On 3 Dec 1834 John Herschel logged this cluster as "B; L; R; glbM; 90"." In 1926, Robert Innes described it as a "Mag[nificent] globular cluster, 2' diameter, bM of thousands of very faint stars." (26-inch refractor, Union Observatory).

300/350mm - 13.1" (2/17/04 - Costa Rica): fairly faint, fairly large, 1.5'-2' diameter, weak even concentration to the center. This is a rich intermediate-age LMC globular cluster.

Notes by Steve Gottlieb