Hipparcos data for two open clusters con
โ
G. Lyngรฅ; L. Lindegren
๐
Article
๐
1998
๐
Elsevier Science
๐
English
โ 206 KB
Using proper motion data from the Hipparcos satellite it is shown that the cepheids S Nor and U Sgr are members of the open clusters NGC 6087 and M 25, respectively. The precision of the Hipparcos data is needed to conclusively carry out a membership test. Parallax data, also obtained from Hipparcos