Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J04575375-0212070

TCP J04575375-0212070   2023 12 30.4424*  04 57 53.75 -02 12 07.0  14.0 U             Ori       9 9

2023 12 30.442

Discovered by Tadashi Kojima, Tsumagoi,Gunma-ken, Japan, on three frames(4_s exp) under limiting mag.= 14.8 taken by Canon EOS 6D digital camera + 300mm f/3.2 lens. Nothing is visible at this location taken on 2023 Nov23.765UT under limiting mag.=15.3. mag=15.1 on 2023 Dec08.575UT, mag=14.3 on 2023 Dec17.539UT with same instrument. CRTSJ045753.5-021206 seems to be brightening.

2023 12 30.589

http://k-itagaki.jp/images/04575375-0212070.jpg

2024 01 01.434

Mag.= 13.2, position end figures 53s.65 07".3 observed by T. Noguchi, Katori, Japan, using 0.23-m f/10 Schmidt-Cassegrain + unfiltered CCD (KAF-0261E), An image at http://park8.wakwak.com/~ngc/images/TCPinOri_20240101.jpg.

2024 01 10.8289

Further brightening to CV=12.45 +/-0.05 observed on 2024-01-10.8289 UTC with the secondary NMW survey camera (135mm f/2.0 telephoto lens + unfiltered SBIG STL-11000 CCD; http://scan.sai.msu.ru/nmw/ ) operating at the Astroverty astrofarm in Nizhnii Arkhyz, Karachay-Cherkessia, Russia. The images are available at http://scan.sai.msu.ru/~kirx/img/TCPJ04575375-0212070/ ---- Stanislav Korotkiy (Astroverty, Ka-Dar), Kirill Sokolovsky (UIUC, SAI MSU), Sergei Ostapenko