Observ. Sunday Evening: USA 129 + others

Bruno Tilgner (Bruno_Tilgner@compuserve.com)
Mon, 30 Jun 1997 16:14:25 -0400

Robert Sheaffer wrote:

>05:11:00      Eastbound Mag. 4 satellite, believed to be USA 129
>              (#24680) moving just south of the keystone of
>              Hercules.

Could you please fill me in which star is called "the keystone of
Hercules" ? I can't find it in R.H. Allen's "Star Names". It may
be an Americanism (like the "Big Dipper"), not known elsewhere.


Bruno Tilgner