V533 Herculis
V533 Herculis was a nova visible to the naked eye, which occurred in 1963 in the constellation of Hercules (constellation), Hercules. The nova was discovered by the Swedish amateur astronomer Elis Dahlgren on 6 February 1963, and independently by an American amateur, Leslie Peltier, on 7 February 1963. Both reported it to be a 4th apparent magnitude, magnitude star. Subsequent examination of pre-discovery images, taken by the Schmidt_camera#Baker-Nunn, Baker-Nunn satellite tracking group at the Tokyo Observatory, showed that the star had begun its nova event as early as 18:36 UT on 26 January 1963, when it had an magnitude of 8. It had attained its peak brightness, magnitude 3, by 17:38 UT on 30 January 1968. All novae are binary stars, with a "donor" star transferring matter to a white dwarf. In the case of V533 Herculis, the pair's orbital period is 3.43 hours. Thorstensen and Taylor analysed spectra of the star in its quiescent state, and concluded that it is a n ...
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