Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J18265456-2719122

TCP J18265456-2719122   2025 01 26.8614*  18 26 54.56 -27 19 12.2   9.2 U             Sgr       9 0

2025 01 26.8614

Discovered by Y. Sakurai, Mito, Japan, on three frames (limit mag.= 10.1) using Nikon D7500 digital camera + 180-mm f/2.8 lens.

2025 01 26.8614

Sakurai-san's image : http://k-itagaki.jp/images/sakurai-Sgr.jpg

2025 01 27.861

Position end figures 54s.24, 12.2" measured with 0.05m f/5 refractor + CCD. J2000, Gaia DR3 positions. Transient position within 2.55" of Gaia 4051881772109701120 (magnitude 19.97 G). No other source appears closer to the position. Photometry - magnitude 9.30 (V), 10.68 (TB) and 9.15 (TR). Andrew Pearce, Nedlands, Western Australia

2025 01 27.8816

Mag.= 8.8 , http://k-itagaki.jp/images/sakurai-PNV.jpg

2025 01 27.861

Apologies, position end figures and photometry reported above were incorrect. The correct position end figures measured are 54s.51, 12.1" measured with 0.05m f/5 refractor + CCD. J2000, Gaia DR2 positions. Transient position within 0.12" of Gaia 4051881016197528192 (magnitude 20.3 G). Corrected photometry - magnitude 9.03 (V), 10.22 (TB) and 8.60 (TR). Andrew Pearce, Nedlands, Western Australia

2025 01 28.3751

V mag=8.99 with G filter, Comparison stars use APASS Vmag. Object is slightly red color. position end figures 54s.54, 12".0 using 0.25-m f/3.8 Newtonian Astrograph + CMOS (T75); remotely Deep Sky Chile. An image at URL http://orange.zero.jp/k-yoshimoto/TCP_J18265456-2719122_20250128.jpg. observed by K. Yoshimoto, Yamaguchi, Japan.