I'm not an astronomer, but I imagine there are too many small untracked objects, between Mars and Jupiter for instance, that periodically occlude stars. I imag

I'm not an astronomer, but I imagine there are too many small untracked objects, between Mars and Jupiter for instance, that periodically occlude stars. I imagine the signal-to-noise ratio is too high to start a search every time something blocks a star. How many millions of times per day must an asteroid somewhere block a star as visible from Earth? Gravitational perturbations are a smaller signal, but the signal-to-noise ratio is better, I imagine.