^ Dreyer، J. L. E. (1878). "A Supplement to Sir John Herschel's "General Catalogue of Nebulae and Clusters of Stars"" (PDF). الأكاديمية الأيرلندية الملكية. ج. 26: 391–426.
Its velocity with respect to the cosmic microwave background is 1898 ± 19 km/s, which corresponds to a Hubble distance of 91.3 ± 6.5 Mly (28.00 ± 1.98 Mpc). [1 ] However, five non-redshift measurements give a much closer distance of 35.39…
NGC 2546 is a pair of independent but overlapping open clusters [2 ] located in the southern constellation of Puppis. This grouping was discovered by French astronomer Abbe Lacaille in 1751-1752 from South Africa. [3 ] [6 ] NGC 2546 is just…