Following Mike Simonsen's announcement
(cvnet-outburst) of an outburst of V589 Her on 2005,
July 2.234 UT, I started an unfiltered CCD
photometry session at CBA Belgium Observatory, using
a 0.35-m f/6.3 telescope and ST-7XME CCD camera. The
session started on July 2.9 UT and lasted for 3.6
hours. V589 Her was at mag 15.2 (unfiltered), and
the resulting light curve (see below) does not show
significant modulations. There was however a fading
trend (0.18 mag over the duration of the
The current outburst therefor either is a normal
outburst, or superhumps still have to develop.
Follow-up observations are recommended.
During the April 2002 outburst of V589 Her, I
detected superhumps in the system, which were
confirmed at that moment by Jerry Foote (CBA Utah).
Full details on the April 2002 campaign are
Using 841 observations from Jerry Foote and myself,
I found a superhump period of 0.0947 +/- 0.0005 d,
using the PDM technique. This turns V589 Her into a
UGSU type dwarf nova inside the so called 'period