Obituary: MNRAS 75, 264 (1915); PASP 26, 77 (1914)

Holden discovered 18 NGC-objects with the new 15.6" f/15.6 Clark-refractor, erected in 1881 at Washburn Observatory, Madison, Wisc. 16 objects are galaxies, one is an open cluster and one is only a pair of stars. References: [1] List of New Nebulae and Cluster Discovered in the Zone Observations at the Washburn Observatory , from April 23 to September 30, 1881, Publ. Washburn Obs. I, 73 (1882); [2] Two New nebulae, Publ. Washburn Obs. II, 101 (1884); the numbers given in the table refer to these papers. NGC 3979 was also found in 1886 by Swift at Warner Observatory (and a second time by him from Echo Mountain as IC 2976). To other objects are credited to Holden by Dreyer: NGC 3531, a galaxy in Leo ([1], No. 3; Apr. 27, 1881), which is identical to Marth' m215 = NGC 3526 (found Mar. 25, 1865). The other one is NGC 7581, a galaxy in Pisces (no reference!), which is identical to NGC 7541, discovered by W. Herschel. Holden is co-discoverer of NGC 7490, a galaxy in Pegasus ([1], No. 23, Jun. 21, 1881), found by Stephan in early 1880. There are 5 other objects in Holden's list [1]: No. 8 = NGC 4592 (W. Herschel); No. 9 = NGC 4997 (Burnham); No. 18 ("coarse cluster"), 19 ("black circular hole in the Milky Way") and 20 ("coarse cluster") are left out by Dreyer.

NGC	No.	Con	Date	Type	Ref
3200	1	HYA	Apr. 10, 1882	galaxy	1
3441	2	LEO	Apr. 6, 1882	galaxy	1
3792	4	VIR	Apr. 27, 1881	2 stars	1
3843	5	VIR	Apr. 27, 1881	galaxy	1
3979	6	VIR	Apr. 23, 1881	galaxy	1
4576	7	VIR	Apr. 27, 1881	galaxy	1
4581	24	VIR	Apr. 20, 1881	galaxy	2
5030	10	VIR	Mar. 17, 1881	galaxy	1
5031	11	VIR	Mar. 17, 1881	galaxy	1
5035	12	VIR	Mar. 17, 1881	galaxy	1
5038	13	VIR	May 28, 1881	galaxy	1
5046	14	VIR	May 17, 1881	galaxy	1
5080	15	VIR	Apr. 27, 1881	galaxy	1
5496	16	VIR	Apr. 23, 1881	galaxy	1
5769	17	BOO	Apr. 27, 1881	galaxy	1
5858	25	LIB	May 14, 1882	galaxy	2
6912	21	CAP	Aug. 14, 1881	galaxy	1
7226	22	CEP	Jun. 20, 1881	open cluster	1

 

15.6" f/15.6 Clark-Refractor