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Further studies of the binary V658 Car (HD 92406) have now confirmed itsunique main features, i.e. a shell star primary component being eclipsed by ahot low-mass star. Obviously, this binary is in its post-Algol evolutionarystage, and containing a rapidly rotating primary star and a contracting hotcompanion star. The analysis of old radial-velocity data indicating a primarystar of lower mass has now resulted in amended parameters for the binary.According to stellar models the primary star should have a mass of 2.16 +/-0.14 Msun and a radius of 1.64 +/- 0.04 Rsun for a Teff of 9700 +/- 500 K basedon known spectral type A0p. For the secondary star 1.46 +/- 0.04 Rsun and 12750+/- 700 K Teff have been derived and are fitting well to an existingevolutionary track for a contracting white dwarf precursor of 0.28 Msun. Ourphotometric results have confirmed the concave shape of the large decretiondisk surrounding the primary star, as predicted by existing models.

Eclipsing binary V658 Carinae (HD 92406) containing a shell star and a hot low-mass star in the post-Algol stage