Points to be comfirmed.
- According to WP, this object was discovered by Nicolas Louis de Lacaille in 1751. But Flamsteed died before it. For that reason, Flamsteed did not listed it in his star catalogue. He and others could not assigned "Flamsteed number" for it.
- Frederick de Houtman listed it as a star before Lacaille.
- In the "British Catalogue" included Historia Coelestis Brirtannica vol.3, we did not find the category of the constellation Tucana. Flamsteed did not ovserve that region.
- In the revised edition of Halley's Star Catalogue by Sharp included Historia Coelestis Brirtannica vol.3, Halley / Sharp listerd only 9 stars in the category of the constellation Toucan, Anser Americanus.
- Lacaille listed it in his "Catalogue of Nebulae of the Southern Sky" (not in his star catalogue) as a nebula not a star cluster.
- #47 is the order within the constellation Tucana in Johann Elert Bode's star catalogue published in 1801.
- Other designations: GCl 1, this "GCl" meanings "Globular Cluster". #1 is order of Melotte's catalogue of deep sky objects . Therefore, correctly "Melotte 1" or "Mel.1".
- On "Omega Centauri", Bayer gave ω for Ptolemy's 21st of Centaurus (＝ NGC 5139) as a star (according to Ptolemy's star catalogue)，and Lacaille followed it (but as a nebula, not a star cluster). Bayer designation and Flamsteed number was assigned to fixed stars both stellar one and nebulous one.--Bay Flam 00:38, 11 February 2007 (UTC)