Central Bureau for Astronomical Telegrams

CBAT "Transient Object Followup Reports"

TCP J05191540-0204515

TCP J05191540-0204515   2026 02 13.4306*  05 19 15.40 -02 04 51.5  14.5 U             Ori       9 9

2026 02 13.431

Discovered by Tadashi Kojima, Tsumagoi,Gunma-ken, Japan, on three frames(6_s exp) under limiting mag.= 15.0 taken by Canon EOS 6D digital camera + 300mm f/2.8 lens. Nothing is visible at this location taken on 2026 Jan18.449UT under limiting mag.=14.7, with same instrument.

2026 02 19.457

Mag=13.7 on 2026 Feb 19.457UT taken by Canon EOS 6D digital camera + 300mm f/2.8 lens ,Tadashi. Kojima

2026 02 20.4660

Follow-up photometry, Feb. 17.4853 UT, V =14.60 using 0.077-m f/4.3 refractor + CMOS. 20.4660 UT, B =14.62, V =14.10, R =13.28, I =13.31. position end figures 15s.51, 53".0 using 0.30-m f/4.0 reflector + CMOS. probable that WISEA J051915.50-020453.0 is brightening. observed by K. Yoshimoto, Yamaguchi, Japan.

2026 02 22.1634

Follow-up photometry with NMW-TexasTech transient survey camera (135mm telephoto lens + unfiltered QHY600M CMOS) on 2026-02-22.1634 UTC CV=14.0. The transient appears to be an unusual brightening of a known T Tauri Star Kiso A-0975 46 = WISEA J051915.50-020453.0 located 2" from the originally reported transient position. VSX record of the variable: https://vsx.aavso.org/index.php?view=detail.top&oid=10872044 ASAS-SN lightcurve: https://asas-sn.osu.edu/sky-patrol/coordinate/42565eb1-12a5-4285-bb8a-dba295455b77 ZTF lightcurve: https://ztf.snad.space/dr23/view/407210300004666 ----- Kirill Sokolovsky, Darien Perla, Vallia Antoniou, Elias Aydi (Texas Tech University)