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We present the first optical observations of the soft X-ray transient Nova Vela 1993, taken during quiescence in 1995 and 1996. From the R-band photometry with a mean magnitude of 20.6, we find an orbital, ellipsoidal modulation with an amplitude of 0.23 mag at a period of 6.86 ± 0.12 h. The optical spectra show only broad double-peaked Hα emission presumably arising from the accretion disc. We es...

An ellipsoidal modulation in X-ray Nova Vela 1993 ( = GRS 1009 — 45)