Re: finding eclipsing binaries

["Sebastian Otero" <varsao@fullzero.com.ar>]

> Delta Vel  -  1.9-2.5v, 45.16d. Primary & secondary eclipses both last for
> almost a day. We're still trying to pin down the exact durations.
Independent
> discoveries in 1997 by naked eye, and in 1989 by the star sensor (a
> non-image-forming navigational instrument) on the Galileo spacecraft. See
> IBVS 4999 for the details. Probably not spotted earlier because it's
> inevitably overexposed by typical photographic, photometric & CCD
procedures.

Fraser,

Delta Vel's period is 45.150 days and its range is 1.95 - 2.4. Eclipses are
not of similar duration, secondary eclipse lasts 0.89 (+/-0.05) days and the
primary only lasts 0.54 (+/-0.04) days.
The secondary only reachs 2.25-2.30 (V).
The night of June 7-8, 2003 we'll be able to spot a primary eclipse of delta
Vel (mideclipse at JD 2452798.588).
This is the brightest eclipsing binary with an amplitude greater than 0.4
mag.
The Top 3 is made up by delta Velorum (1.95), beta Persei (2.10) and gamma
Persei (2.91).

Regards,
Sebastián.