[vsnet-alert 23422] TCP J21040470+4631129 - appearance of full grown superhumps

[Tonny Vanmunster tonny.vanmunster@gmail.com via vsnet-alert]

Dear colleagues,

 

I just finished analysing my V-filtered CCD observations of TCP J21040470+4631129, obtained last night (July 23/24, 2019) at CBA Extremadura Observatory using a 0.40-m f/5.1 telescope and SX-46 CCD camera, under clear skies. The light curve shows – for the first time since its current outburst – the appearance of prominent full grown superhumps with an amplitude of 0.14 mag. 


A period analysis using the ANOVA, Lomb-Scargle and PDM methods (Peranso), yields a combined superhump period of 0.0552 +/- 0.0002d. The object was at mag 10.95 (V) on Jul 24th. 

I will send my observations to AAVSO, CBA and VSNET for further analysis. 

Follow-up observations are evidently highly recommended.

Best regards
Tonny

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Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
 <http://www.cbabelgium.com> www.cbabelgium.com
www.peranso.com <http://www.peranso.com>