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CBAT "Transient Object Followup Reports"

TCP J21382907+4146190

TCP J21382907+4146190   2025 08 01.5532*  21 38 29.07 +41 46 19.0  13.7 U             Cyg       9 3

2025 08 01.5532

Discovered by Yuji Nakamura, Kameyama, Mie, Japan, on four frames (15-s exp. limiting mag. 15.5) using 0.10-m F3.0 refractor + unfiltered cooled CMOS camera. Nothing is visible at this location on the frames taken on 2025 July 29.5601 UT (15-s exp. limiting mag. 15.5). This TCP may be identical with AT 2025sss. https://www.wis-tns.org/object/2025sss --- Isao Endoh (NAOJ)

2025 08 02.4640

follow-up : mag is, B= +14.491, V= +14.299, Rc= +14.143, with 0.36m FLI 1001E 30 sec, Nayoro Hokkaido Japan, obs by, Yasuo Sano, http://sn1997ef.web.fc2.com/sn/variable/cyg_tcpj_20250802.html