Open cluster M25 as photographed by Jan Wisniewski. This cluster contains one of the nearest Cepheid variables: U Sgr; this is a classical cepheid of period 6.75 days.

This M25 image was taken on June 14, 1999 from Sooke, BC using Cookbook 245 LDC CCD camera on Ultima 8 f3.0 telescope, autoguided with Cookbook 211 LDC CCD camera on piggybacked 500mm f8 telephoto lens. It is composed of W (6 x 2 min.) and CMY (3 x 2min.) integrations processed with Multi245, AIP245, QColor as well as PhotoPaint 8.

More images of M25

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Hartmut Frommert (spider@seds.org)
Christine Kronberg (smil@lrz.uni-muenchen.de)

Last Modification: 11 Oct 2000, 14:00 MET