[AZ-Observing] Re: Trapezium Eclipsing Variable Star Light Curve
- From: Brian Skiff <bas@xxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Sun, 5 Nov 2006 19:44:59 -0700 (MST)
The complet lightcurve by Zakirov in 1979PZ.....21..223Z
(not on line, as far as I know), shows the ingress/egress to
each occupy 0.005 of the period. The period is 65.43233 days,
so somewhat less than 8 hours to go from uneclipsed to full
eclipse, and another 8 hours to come out.
The lightcurve in the Franz paper:
http://www.konkoly.hu/cgi-bin/IBVS?1274
...shows about four hours going into eclipse, but since that was
a March event, Orion set before midnight. But extrapolating
the curve to the midnight-ish time for the upcoming event,
suggests if you pick up the Trapezium right at dusk and follow it,
then you'll be able to see the change to minimum and the turnaround
rising back up again by very late in the night.
\Brian
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