The Index Catalogue (IC) 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 in 1908 to list 5,386 objects, known as the IC objects. The catalogue was compiled by J. L. E. Dreyer, who published it as two appendices (IC I & IC II) to the New General Catalogue. It summarized the discoveries of deep sky objects made between 1888 and 1907.