Orientation chart for Campbell, CA / South Bay (≈37.29°N, 121.95°W). Pick a month and local time; the wheel shows which major landmarks sit above the horizon. Educational — approximate sidereal rotation, not a precision planetarium.
Method: local sidereal time ≈ Greenwich mean sidereal (Meeus-style approximation) + longitude. Horizon altitude from equitorial (RA/Dec) → alt/az. Bright-star catalog is a small public educational subset (Hipparcos/Yale Bright Star magnitudes, rounded). No paid APIs.