Index Catalogue

From Wikipedia, the free encyclopedia

This article is about the astronomical catalogue. For the U.K. retailer, see Index.

The Index Catalogue (IC) —also known as the Index Catalogue of Nebulae, the Index Catalogue of Nebulae and Clusters of Stars, IC I, or IC II— is a catalogue of galaxies, nebulae and star clusters that serves as a supplement to the New General Catalogue. It was first published in 1895, and has been expanded to list more than 5,000 objects, known as the IC objects.

The catalogue was compiled by J. L. E. Dreyer in the 1880s, who published it as two appendices (IC I^[1]& IC II^[2]) to the New General Catalogue. It summarized the discoveries of galaxies, clusters and nebulae between 1888 and 1907.

[edit] Notes

^ Index Catalogue of Nebulae found in the years 1888 to 1894, with Notes and Corrections to the New General Catalogue, Dreyer J. L. E., 1895, Mem. R. Astron. Soc., 51, 185-228
^ Index Catalogue of Nebulae and Clusters of Stars,containing objects found in the years 1895 to 1907; with Notes and Corrections to the New General Catalogue and to the Index Catalogue for 1888-94, Dreyer J. L. E., 1908, Mem. R. Astron. Soc., 59, 105-198