How difficult is a sub 1:30 half

I am a 3-year removed runner who used to be slightly above average (17:05 5k) but I have definitely lost a ton of my aerobic capacity as I only run a few times a month.

If I wanted to ramp up to a half marathon in 8-9 months, is getting to a sub 1:30 pace even in the realm of possibility?

Basically is that enough time to get back in running/racing shape.