Return to Home Page
From: "Sebastian Otero" <varsao@fullzero.com.ar> Date: Wed, 4 Dec 2002 11:18:45 -0300 Subject: [vsnet-ecl 775] Eta Geminorum eclipse in progress Dear colleagues, Although the current fading of eta Geminorum seems to be in phase with the semiregular pulsation cycle, a close look to the ephemeris makes the difference. We are probably seeing the descending branch of one of the very strange eclipses of this long period system (2983-2984 days). I couldn't find accurate elements, but the GCVS epoch is JD 2437725 and this means minimum will occur somwhere between JD 2452640 and 645.(December 31-January 4). Eclipse duration is 5% of the period, which means 74-75 days. This is exactly when my first point of the season was collected and since then the fading trend is apparent. I think it would be interesting trying to see the features of the eclipse light curve, specially in order to identify the combination of both the SR and the EA behaviour. I have uploaded a lightcurve at: http://ar.geocities.com/varsao/Curva_Eta_Gem.htm Best regards, Sebastian.
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
