Image shows several "Dips" in 2023 - 2024 approximately 3-4 months apart. The "Media-Dip" was first announced in February/March 2023, 15 months ago.

2. Image :
Shows the "Dip" 9 months before the Nova in 1946, but this light-curve is not similar to the latest light-curve. Maybe it is not reliably.

Before 1946, we had a nova approximately 80 year earlier, in 1866.
And in 1787, approximately 79 years earlier. So if 79.5 years is the period, then we should expect an outburst in the second half of 2025.

Mag (9.4:6/10),(9.3:6/06),(9.7:5/28),(9.3:5/24),(9.5:5/23),(9.5:5/22),(9.7:5/19),(9.7:5/19),(9.7:5/17),(9.5:5/16),(9.5:5/15),(9.7:5/14),(9.0:5/12),

AAVSO information :
https://www.aavso.org/
https://www.aavso.org/news/t-crb-pre-eruption-dip

See Dr. Brad Schaefer lecture :
https://youtu.be/1Zfg67Q-szU?si=5xTAspVmr9ofMYtv

T Coronae Borealis Wikipedia
https://en.wikipedia.org/wiki/T_Coronae_Borealis

Old info. Sky & Telescope 2016
https://skyandtelescope.org/observing/whats-up-with-t-crb04202016/

Time: 22:32UT 2024-06-20 Exp.12 x 3sec
Telescope: 0.254m f/7.3 ST-10XME CCD 2x2bin 1.5"/pix
Odd Trondal Obs.code 238 (Uranium). Oslo Norway.