Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J18513997+3522412

TCP J18513997+3522412   2025 05 22.7188*  18 51 39.97 +35 22 41.2  13.7 U             Lyr       9 8

2025 05 22.7188

Discovered by Yuji Nakamura, Kameyama, Mie, Japan, on two frames (10-s exp. limiting mag. 15.0) using 0.10-m F3.0 refractor + unfiltered cooled CMOS camera. Nothing is visible at this location on the frames taken on 2025 May 14.6651 UT (20-s exp. limiting mag. 15.5) We found faint source Gaia DR3 2093166540936884992 at 20.6 mag at the corresponding position. --- Isao Endoh and Seiichiro Naito (NAOJ)

2025 05 23.4942

follow-up : mag is, B= +14.75, V= +14.58, Rc= +14.50, with 0.36m FLI 1001E 30 sec, Nayoro Hokkaido, Japan obs by, Yasuo Sano, http://sn1997ef.web.fc2.com/sn/nova/lyr_tcpj_202505.html

2025 05 23.4942

follow-up : Continuous metering with different comparison stars Amplitude can be seen, mag is,B= +14.67, V= +14.19, Rc= +14.46(Average), with 0.36m FLI 1001E 30 sec, Nayoro Hokkaido, Japan obs by, Yasuo Sano, http://sn1997ef.web.fc2.com/sn/nova/lyr_tcpj_202505.html