Obituary: AN 261, 443 (1936); Weltall 37, 69 (1937)

Clemens found the open cluster IC 4996 in Cygnus, but is was seen already by W. Herschel in 1786. Clemens noticed the object on a plate taken for the Photographische Himmelskarte with an 10.5" f/10.5 astrograph at Potsdam Observatory. He marked a cluster of 12 stars. Dreyer incorrectly credits IC 4996 to Bellamy, who found the object in 1903.

D

N

NI

Y

M

D

Ap

I

T

Discoverer

Observer

Con

Type

S

Author

Title

Source

I

4996

1896

6

13

10,5

Rr

p

Herschel W. 20.9.1786

Bellamy 9.10.1903

CYG

II3p

4

Scheiner, J.

Photographische Himmelskarte

Vol. 2, p. 221, plate 922, Potsdam 1896