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V446 Her is the best example of an old nova which has developed dwarf novaeruptions in the post-nova state. We report on observed properties of thelong-term light curve of V446 Her, using photometry over 19 years. Yearlyaverages of the outburst magnitudes shows a decline of ~0.013 mag/yr,consistent with the decline of other post-novae that do not have dwarf novaoutbursts. Previous suggestions of bimodal distributions of the amplitudes andwidths of the outbursts are confirmed. The outbursts occur at a mean spacing of18 days but the range of spacings is large (13-30 days). From simulations ofdwarf nova outbursts it has been predicted that the outburst spacing in V446Her will increase as M-dot from the red dwarf companion slowly falls followingthe nova; however the large intrinsic scatter in the spacings serves to hideany evidence of this effect. We do find a systematic change in the outburstpattern in which the brighter, wider type of outbursts disappeared after late2003, and this phenomenon is suggested to be due to falling M-dot following thenova.

The Dwarf Nova Outbursts of Nova Her 1960 (=V446 Her)