If an observer is trying to catch Venus as the morning star, what is the recommended time window to begin scanning the eastern horizon?

Answer

About 45 to 60 minutes before the predicted time of sunrise.

To effectively catch Venus as the morning star, timing is critical; observers should start scanning the eastern horizon approximately 45 to 60 minutes prior to the predicted time of sunrise.

If an observer is trying to catch Venus as the morning star, what is the recommended time window to begin scanning the eastern horizon?
astronomyVenüsplanetsplanetskycelestial