[vsnet-alert 10754] V723 Cas Ephemeris

[bydra at Safe-mail.net]

Should've done this earlier...

Alrighty, taking this

<http://articles.adsabs.harvard.edu/full/gif/2002ASPC..261..625G/0000626.000.html>

for the ephemeris, and equating the description there with the graph here, (noting also that Max I is said to be around phase 0.35 [ignore the m, it's a typo])

<http://articles.adsabs.harvard.edu/full/gif/2003BaltA..12..610C/0000613.000.html>

such that Min I = phase 0.0 = phase 1.0 = mideclipse, we get AAVSO PKV's 15.0 V measure to be at 0.3 of phase, ie not far off of max.

AAVSO MRV's 15.14 V measure is at around 0.68 of phase, or just about at the "Max II" or hump feature after the dip in the plateaued maximum.  Just about right on the above graph, at 0.14 less than at phase 0.3.  Well, maybes there's a tenth or two of mismatch mag wise.

Caveats are that a later Goranskij et al 2007 paper's abstract says V723 Cas is about 2 mags in V amplitude nowadays, as amplitude continutes to increase, and they also say the period is increasing, but how significant an amount that is isn't noted that I noticed.

http://adsabs.harvard.edu/abs/2007AstBu..62..125G

Oh, and of course, I ain't GJDed the HJD, reckoning a potential +/- eight and a third minutes to be negligible for this phaseplot relative to the nine hundred and ninety eight point three minute orbital period (ie < +/- 0.01 of phase).

At such an amplitude, if Gary folds about a year's worth or less of his prolific visual observations for this object upon a period of 0.693265 days he should get a nice-ish little phaseplot for his lightcurves' page, increasing amplitude notwithstanding.

John