TCP J02191736+2857158: rebrightening As expected, this object is now showing a rebrightening. The peak brightness should be ~15.0-14.8 mag. The rebrightening will be long-duration or multiple-type. Further observations are strongly encouraged. The observations are reported by Josch Hambsch, David Messier, Filipp Romanov, Hubert Delafay, Pavol A. Dubovsky, Moriyama-san, Sano-san, Itoh-san, and Stephen M. Brincat. On 2026/08/05 2:29, Hiromasa Hoke via vsnet-alert wrote:
dear all,
This object was at ~16 mag around BJD 2461257.5 and is expected to have entered a rapid fading phase. However, similar objects have shown rebrightening, and a similar rebrightening is predicted for this object within the next 2–3 days. Continued follow-up observations are highly encouraged.
On 2026/07/25 9:16, Keisuke Isogai via vsnet-alert wrote:
the object has a superhump period of ~0.048(1)d. This period of 69 min is below the period minimum. This value and the strong helium-rich spectrum, which we reported to ATel, suggest that this object is an EI Psc-type object showing a WZ Sge-type superoutburst. Such an event is very rare. Further observations are encouraged.
On 2026/07/24 20:24, Hiromasa Hoke via vsnet-alert wrote:
TCP J02191736+2857158: growing superhump
Moriyama-san, Stephen, Funada-san, Peter Starr and Itoh-san reported the observation. According to the data from the last three days, the object has a superhump period of ~0.048(1)d. Further observations during this phase are very important. The current magnitude is ~14mag.
best regard, Kyoto University master's grade 2 Hiromasa Hoke